Instrument Clinic Kangaroo Leather Alto Saxophone Pad Installation Kit, with Metal Resonators, Leak Light, Fits Yamaha YAS23 Made in the USA with premium kangaroo leather alto sax pad set for Yamaha Stainless steel domed style resonators Includes leak light, shellac *****Cork requires contact cement for installation (not included). Includes 2 feeler foil strips for initial leak detection