20 Series pneumatic couplers mate with Industrial Interchange nipples, the standard male tip of the pneumatic industry. Available options include Sleeve-Lok, stainless steel locking balls and springs and grip-ring sleeve. Mates with Industrial Interchange nipples manufactured to A-A-59439 (MIL-C-4109F, ISO 6150-B) global standards. 1/4 inch body size has a brass body and steel valve, 3/8 inch body size has all steel construction. Tubular valve delivers high flow with minimal pressure drop. Integral sleeve guard resists accidental disconnection. Standard seal is Nitrile.