[FUNCTION] This connector has a thimble, in the course of the operation, it will not open the air conditioning core tube, completely solve the problem of fluoride leakage injury, security is guaranteed. [USEFUL ADAPTER] 516 Female, 14 Male SAE R410a Swivel Adapter With 45 angle on the service port site for easier access. [FITMENT] Hvac hose adapter perfectly fits for R410a mini split system air conditioners, HVAC, and refrigeration service. [PREMIUM QUALITY] 2Pcs x R410a adapter for mini split system air conditioners 516 to 14, Made of high quality Brass Alloy, last long; Easy to operate and install, strong sealing for durability and safety. [SERVICE GURANTEE] This r410a refrigerant adapter complete with 1Year limited warranty, if you have any problems or concerns, please kindly send us mail any time, we are always here to provide you 100 satisfied aftersale service.