Pneuflex's SPEG 10-08 model is 10mm to 8mm O.D tubing stainless steel union tee reducer push to connect air fittings, T shaped body used to connect three pneumatic tubes, of which tube in the middle is a reducer tube of 8mm diameter. It's very easy to push in and pull out the tubes from SS union tee reducer push to connect fittings without tools help. Constructed of SS 316 and FKM (Viton) seal, which can hold a variety of tubing material including nylon, PU, PA, PE, Teflon...