P2KGSET4 Generation II Professional Copper Series Timpani. Set of 4 (23", 26", 29", 32"). Copper bowls are pressed formed to maintain even thickness throughout the kettle. Kettle is fully suspended by a contoured rolled steel ring for a 100% round sound. Tension mechanism mounted outside the kettle for maximum tonal clarity balanced action floor pedal. Aluminum base and struts. Each kettle complete with Remo Renaissance head with insert ring, tuning gauge and cover.