uxcell&reg; 8mm Connecting Dia Aquarium Brass Y Shape 3 Ways Airline Air Valve Product Name : Aquarium Air Valve;Material : Metal Color : Brass Tone;Connector External Diameter : 8mm / 0.31" Inner Diameter : 5.8mm / 0.2";Total Size : 4.5 x 4.5 x 0.8cm / 1.8" x 1.8" x 0.3"(L*W*T) Weight : 13g Package Content : 1 x Aquarium Air Valve