UNIVERSAL COUPLINGS -U.S TYPE( HOSE END/MALE END/FEMALE END) Universal couplings-U.S TYPE Univesal hose couplings ,also known as Chicago and aire hose couplings ,have an identical claw-atyle head that allows you to connect to another Chiavago hose Couplings ,regardless of the pipe size or barbed hose ID. Universal couplings-U.S TYPE Univesal hose couplings ,also known as Chicago and aire hose couplings ,have an identical claw-atyle head that allows you to connect to another Chiacago hose Couplings ,regardless of the pipe size or barbed hose ID. The universal hose couplings can be made of carbon steel ,brass and stainless steel materials.Carbon steel couplings are stronger and more durable than the other metal couplings .The Carbon steel couplings are used in noncorrosive environments. Specifications Material: carbon steel zn pleated (the most popular), stainless steel and brass Size: 1/4 to 1 for 2-lug structure and 1-1/4 to 2 for 4-lug structure Seal: NBR Thread: NPT Part: male end, female end, hose end and 3-way Working pressure: 10 bar, max. Test pressure: 16 barHose end is one of Chiacago universal air hose coupligns, which is available for carbon steel, brass and stainless steel. The carbon steel hose ends are the most popular because of the economical and durable life. Hose ends is available in 1/4 to 2 with matched 2-lug or 4 lugs. Male end is one of Chicago universal air hose couplings, which is available for carbon steel, brass and stainless steel. The carbon steel male ends are the most popular because of the economical and durable life. Male end is available in 1/4â?³ to 2â?³ with matched 2-lug or 4 lug. Female end is one of Chicago universal air hose couplings, which is available for carbon steel, brass and stainless steel. The carbon steel female ends are the most popular because of the economical and durable life. Female end is available in 1/4â?³ to 2â?³ with matched 2-lug or 4 lugs 3-Way is one of Chicago universal air hose couplings, which is available for carbon steel, brass and stainless steel. The carbon steel hose ends are the most popular because of the economical and durable life.