Features: Make of ABS materials, which have good strength and stiffness, they also have good abrasion and heat resistance. Easy to install: Before installation, cut the pipe flushes and insert one way check Valves. Good sealing, not easy to leak, easy and quick to plugs and unplug, and will not damage pipes or fittings. These quick connect fittings are strong and can be firmly connect with other fittings with high stability. Suitable for reverse osmosis water filtrations systems 3/8inch outlet hose These quick connect fittings use push in technology for easy installation and removal and require no tool. Specifications: Materials: ABS Length: about 5.65cm/2.22inch Package Includes: 2Pcs One Way Check Valves note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.