Anti-microbial Source Camelbak Hydrapak Platypus Compatible 45 Degree Bite Valve. 45 Degree Bite valve replacement. Wide Flow. *********** Very practical for hiking, camping, mountaineering, hunting, biking, kayaking, military, police, paintball, airsoft, and outdoor sports. Attaches to Camelbak, Platypus, Geigerrig, Platypus, MSR, Osprey Backpack, Pack Hydration drink tube.... Measure your drink tube Inside Diameter before you order.