"Tie-rod construction, double-acting, heavy-duty, high-strength tie rods. With ground and polished chromed piston rod, cast iron piston with O-ring seals and back up washers, polyurethane rod wiper, cast malleable rod clevis, zinc plated pins and clips. The maximum working PSI is 3000 and bursting PSI is 5000. Seal kits are available also. U.S.A. Bore Diameter in. 3 1/2, Stroke Length in. 18, Closed Pin Center in. 28 1/4, Shaft Diameter in. 1 3/8, Max. PSI 3,000. 1/2in. working ports and 1in. pins"