2. 8 inch/7 cm replacement piping nozzle for your water bag it can be used directly to the pipe of your water bag. the connection to water pipe outside diameter is about 0. 33 inch/8. 5 mm, fit for normal 0. 29-0. 33 inch/7. 5-8. 8 mm inner diamater pipe good accessory for camping, hiking, cycling etc. Outdoor activities

You will receive 2 bite valves , and they will be great hydration pack accessories when camping, hiking, biking, etc., outdoors. Easy use bite valves with on-off switch, easily control water flow with the yellow lever whick will no leak. Fits all brands and types of hydration water bladders. Easy installation without alteration on your backpack drink tube. Using Medical Grade Silicone, compatible hydration pack drink tube bite valve.