This kit contains 17 clarinet pads, intended for Yamaha Bb clarinets. Our IC540 clarinet pads are high quality, double skin, with premium felt. Made in USA! 4 pieces of our popular clarinet tenon cork are also included. This cork is AAAA quality, natural tenon cork. If you would like to choose the sizes, please email us the requested sizes when you checkout. Pad diameters range from 8mm - 19mm in 1/2mm steps. Measure the outside diameter of your current pad (in mms). Always round down if it is close. For example, a pad measuring 15.3 mm would require a 15.0mm pad. This kit also contains: (1) small tube of adhesive pellets (1) LED leak light (1) set of written instructions (6) key wedges (1) Instrument Clinic woodwind repair screwdriver (1) .25oz jar of key polish (2) Strips of sandpaper (1) contact cement brush (1) razor blade (1) set of written instructions. *Please note: You will need a clean-burning heat source, such as a mini butane torch, or alcohol lamp for pad installation (not included). ***Cork Requires Contact Cement for Installation (not included)