The Pearl Philharmonic Series Concert Toms feature 100% 6-ply African Mahogany shells for rich sustain and powerful penetrating bass tones. The Double-Headed Toms have Pearl's outstanding R2 Air Tom suspension system. Its exclusive four-point floating isolation platform was developed following a two-year research and development journey. By understanding that every drum's best mounting point is in the CENTER of each shell, mounting weight is equally balanced across two floating points at the top and bottom of each tom. This gives true tonal separation from mounting hardware and enhances sonic output. Features: 6-ply African Mahogany Shell. Maple Reinforcement Rings. R2 Air Suspension & L-Arm Receiver. SuperHoop II 2.3mm Triple-Flange Rims.