Eight-stage, single-port, double-acting, nested telescoping air cylinder completely uses all space inside the cylinder, giving maximum stroke at minimum compressed length. Bore sizes range from 3 /4- to 4-in. Construction is hard-anodized aluminum tubes, plastic pistons with O-ring seals, plastic rod bearings in informal front-end caps. Prelubricated for use with dry clean air up to 150 psi; 100% repairable. Surface scratches on extended parts will not change performance, because there are no rod seals.

Ergo-Help, Inc., (847) 593-0722, www.ergo-help.thomasregister.com