Packaging: You will receive 4*brass inflator adapters with 4*lids. Material: The inflator adapter is made of high-quality brass material, which is sturdy and durable. Installation: Simply tighten the inflator hose adapter and air pump without using too many tools. Design: Adopting standard thread design, it has better fit and good sealing, and is not easy to fall off Application: Pneumatic chuck adapter can be used for air pumps, air compressors, tire chucks, air hoses, and inflation accessories.