Check the listing for details. 5-Pack One Way Check Valve, 1/4" Barb Hose Non Return Check Valve 1.76" [Clear]. Condition: New. Listed at 9.92 USD. PRODUCT APPLICATIONSOur one-way air check valves are suitable for a wide range of environments and occasions, whether it is air pumps, air compressors and gas pipelines, aquariums, fish farming, and other residential, commercial, and industrial areas. It is an excellent fitting for air piping connections.PRODUCT DETAILS & INCLUDE√ Material: Plastic√ Color: Clear√ Thread Fit Size: 1/4"√ Diameter at wider inlet and outlet: 7.85mm / 0.31"√ Diameter at narrower inlet and outlet: 6mm / 0.24"√ Middle Diameter: 18.3mm / 0.72"√ Length: 44.8mm / 1.76"√ Package Includes: 5Pcs x Plastic One-Way Air Check ValvePRODUCT ADVANTAGES1. Our check valves are made of high-strength plastic for stability and reliability. The nickel-plated surface is so durable and weather-resistant for a long service life.2.