Cyful 6pcs Aquarium Air Pump Check Valves Plastic One Way Non Return Air Pump Accessories

Specification: Product Name: Fish Tank Check Valves Material: Plastic Size: Air Hole Diameter (approx): 4mm/ 0.16" Overall Size: 55 x 15mm/ 1.2" x 0.6" (L* D). Note: 1.Each one check valve is required for each outlet, and two for double-head pumps, and so on. 2.The check valves are for common aquarium air pumps. DO NOT use them with CO2 system. About US Cyful focus on retail and wholesale hardware items and other accessories, all of the products we sell are strictly selected, we provide high quality, the most popular, affordable price products to worldwide. Warmly Note: 1.) The colors may have difference as the different display, please understand. 2). Please allow 1-2mm error due to manual measurement, please make sure you do not mind before you bid. 100% Satisfaction Guarantee: We are super confident in the quality and comfort of our product that we offer 100% satisfaction guarantee! Try our products and if you don't absolutely love them just let us know. We are committed to bringing all of our customer an pleasant shopping experience.