Bore sizes range from 7/16in. to 2in. and standard strokes from 1/2in. to 12in.. Available in 4 bore sizes, Floating cushion seal, Cushion adjustment is recessed so it doesnt protrude, Piston wear ring to extend life, Auto switch capable, 1 1/16" NCM DBL-ACT AUTO-SW, ACTUATOR, NCM ROUND BODY CYLINDER, JE, 1 1/16" NCM DBL-ACT AUTO-SW, 5.1073 lb