Uxcell 14-Piece Plastic 1-Way Aquarium Air Pump Valves, Pink/Clear Product Name : Aquarium Check Valve; Fit for : Aquarium Dimension : 1.5 x 5.3cm/0.6" x 2.1"(Max.D*L); Ports Outer Diameter : 5mm/0.196" External Material : Plastic; Color : Clear, Pink Weight : 9g Package Content : 14 x Aquarium Check Valve