Brass Craft CR1900R R1 1/2 Nom Comp by 3/8 O.D. Comp by 1/4 O.D. Comp Right Brass Craft CR1900R R1 Dual Outlet Stop, Rough Brass Stop type: compression inlet Riser outlet: 3/8-Inch OD (1/4-Inch nominal) Inlet: 1/2-Inch nominal copper (angle) Right-side outlet: 1/4-Inch OD 1/4-turn on/off provides smooth operation