Vestil Manufacturing Corp Upgraded Glass Filled Nylon, Light Duty (RX) Casters Stretch Web Tether Versatile design: The helmet is

Versatile design: The helmet is designed to be versatile and adaptable to a variety of work environments

(1/4" & 3/8" are only sold in sets of 2)

Lift rate is 1/4" per crank revolution

Rugged welded steel construction provides strength and durability

Vestil Manufacturing Corp Upgraded Glass Filled Nylon, Light Duty (RX) Casters Stretch Web Tether Versatile design: The helmet isVestil Manufacturing Corp Upgraded Glass Filled Nylon, Light Duty (RX) Casters Made of high tech proprietary glass filled nylon (RX). Provides better impact resistance than standard glass filled nylon. Does not absorb moisture like phenolic, and offers better floor preservation than steel or cast iron. Resists most chemicals, solvents, gases, acids and steam cleaning. Top plate measures 4 x 4 1 2". Black tread color. 85 (+ 5) Shore D. Wheel core