The All-In-One Trumpet Maintenance Solution The Yamaha YAC TRKIT is an All-in-one trumpet Care & Maintenance Solution Perfect for players at any level. Each kit is specially designed to contain the highest quality cloths, brushes, swabs, and lubricants to keep any instrument in top playing condition. Each kit also features an easy-to-understand care & maintenance manual and re-closeable plastic bag for item storage. Features Premium Valve Oil Slide Grease Flexible Cleaner Polishing cloth Casing brush Care and maintenance Manual Mouthpiece brush