Series NCA1 medium duty tie rod cylinders are NFPA interchangeable, have a crimped piston rod assembly, are pre-lubricated and available in 11 mounting styles. Bore sizes range from 1.5 to 4 inches.á The NCA1 expanded line of medium duty cylindersáoffer bore sizes ranging from 5 to 8 inches, and come standard with adjustable air cushion.