"Double ring stool has padded vinyl seat with Northern Industrial logo. Adjusts from 27in. to 32in.H with pneumatic adjustment lever under the seat. Stool rotates 360. Backrest adjusts and can be removed when desired. Bottom ring is 8 1/2in.H; top ring is 17in.H. Some assembly required; instructions included. Material: Vinyl, Adjustable: Pneumatic, Height Range (in.): 27 - 32, Includes: Instructions"
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