2.5" (65mm) female swivel inlet x two 1.5" (38mm) male outlets. This wye is intended for use in high rise packs. One branch of the wye connects to the hose in the pack. The other branch has a quarter-turn aluminum ball valve for positive shutoff. A pressure gauge is mounted on top of the wye. Rugged, lightweight aluminum alloy casting with durable powder coat finish inside and out, hard coat anodized couplings and super tough folding nylon handles. 2.5" NH female rocker lug swivel inlet coupling is standard.