Jardin Plastic Air Pump 10-Piece Check Valves for Fish Tank, Blue Product Name : Check Valve; Use for : Fish Tank, Aquarium Connector Diameter : 5.5mm/0.22"; Overall Size : 35 x 18mm/1.4" x 0.72"(L x D) Weight : 20g Package Content : 10 Pcs x Aquarium Check Valve