Durable and high standard brass barb tee fitting . Commonly used to connect lines for air, fuel, oil and inert gases in a quick and simple way. Hose :1/4"(left) x 1/4"(right) x 1/8"(middle) Barbed Net Weight: 23g/pc. For use with plastic or rubber hose fittings connects to hose on all end. See listings in my store for groups of 1, 2, 4, 6, and 12 packs. This fitting is made of brass and connects three lengths of hose in a branch tee. Barbed fittings create a tight seal on flexible and semi-rigid hose when used with a hose clamp or crimp sleeve or ferrule. This fitting is for a fixed connection between plastic or rubber hose. It is made of brass for corrosion resistance. Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. SELECTING THE RIGHT HOSE BARB FITTINGS: A hose barb works by putting tubing over the top of the barb, so the hose barb O.D. will be larger than tubing I.D. to increase the barb's ability to hold onto the tube. Hose barbs are sized by the tubing I.D. (Inner diameter). The correct hose barb is the inner diameter of the tubing. Ex. 1/8" Hose barb is 1/8" tubing I.D.