Not all faucets have traditional faucet threads, in which case the use of faucet adapters is recommended to adapt housings to various thread sizes. NEOPERL adapters are designed to connect traditional thread size housings to almost evert metric and US thread. A large selection of high quality adapters are offered. High quality, lead free material is used and the finish is first class chrome plating. This kit contains an assortment of 17 adapters for solving thread issues on the job. Perfect for putting on the truck.