Tec Line: Cleanroom and ESD have a height-adjustable back that provides 3" adjustment range for both back and lumbar. There's a polished 20" diameter with simple rotation/lock for height variation of the foot ring for the stool. Cleanroom offers a black nylon, five-star base. The base for both Cleanroom and ESD is a polished aluminum, five-star base. Casters with soft wheel braking for hard floors are standard specifications.
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