Features: The winterizing adapter is made of heavy duty brass metal material. Strong ruggedness and good durability.It can reduce the use of antifreeze, very convenient. This winterize adapter is standard threaded connection in most cases, designed with a 1/4 inch male air compressor quick plug to a male 3/4 inch garden hose inner thread. This blowout adapter may also be used to winterize sprinkler system, suitable for most water system RVs boats campers travel trailer such vehicles which with water supply system. Easy to operate. Make sure your model number before you buy. Please check each thread before use, please use thread sealing tape to seal. Specifications: Material:Brass Type:Internal Thread,External Thread,Internal Thread + External Thread Package Includes: 1x or 1Set Winterize Blowout Adapter note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.