321 Hand Operated Stool

Blue, pnuematic stool with backrest with dual wheel caters MTI 321 series.

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321 Hand Operated Stool

The 321 Hand Operate Stool with Backrest is MTI’s most economic line of seating. Dual wheel casters and black composite base make it easy to maneuver quietly and smoothly over all types of surfaces without damaging or marring the floor. Treat yourself to a soft and supportive seat with MTI’s premium line of seating.

Control: pneumatic hand lever
Base: black composite
Backrest: ergonomic
Seat Width: 16.5”
Seat Height: 18.25-24.5”
Upholstery: smooth
Weight Capacity: 300 lbs.
5 Casters: hard rubber or optional urethane tread
Accessories: multiple options (see details below)

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Seat Diameter: 16.5"
Height: 18.25 - 24.5"
Weight Capacity: 300 lbs.
Base Options: Black Composite
Backrest: Ergonomic Backrest
Actuation Style: Hand Actuated
Actuation Type: Pneumatic Lift

Blue Ridge

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Diplomat Blue

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Midnight Blue

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Arctic

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Taupe

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Beach

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Buff

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Papyrus

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Pine Cone

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Gunmetal

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Laramie

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Walnut

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Mocha

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Silver Pearl

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Dove Grey

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Dove

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Slate

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Schooner

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Raven Wing

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Black

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Port

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Chianti

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Burgundy

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.
Garnet

Our Ultraleather upholstery is PVC-free and made from a soft-touch material with high-strength fibers. It is thoughtfully crafted for a more luxurious feel, combining elegance with durability.
Pine Forest

Our Premium upholstery is a seamless upholstery style which is an easy to clean, durable and reliable solution.

6” Stool Extension

The 6” Lab Height Extension tube raises the stool up 6”.

> Available only for stool models 320, 321, 322, 323, and 324 pneumatic hand operated stools.
Foot Ring

The adjustable foot ring provides a rest for your feet during procedures where the chair seat is too high for you to reach the floor.

Available only for stool models 320, 321, 322, 323, and 324 pneumatic hand operated stools.
Locking Dual Wheel Casters

Locking dual wheel casters make it easy to maneuver quietly and smoothly over all types of surfaces and without damaging or marring the floor.
Stationary Glides

If you don't need to roll your chair from one location to another and want the chair not to roll around, choose the glides as your option.

Fire Barrier (CAL-133)

MTI's TB133 option meets the California Technical Bulletin #133 (CAL-133) for flammability testing for seating furniture for use in public occupancies. MTI achieves compliance without the use of flame retardants. This option can be added to any upholstered item containing foam.