NEOPERL adapter kits make ordering replacement parts easy. The kits contain 17 adapters to solve almost any thread issue found in the field. The Washer Kit has an assortment of regular and junior size washers, perfect to replace that missing washer on the go. The Shower Solution Kit features two different products in three different flow rates for shower retrofit. The Water-Saving Aerator Kit contains a wide selection of NEOPERL water-saving products.