Canopus set from the RFM (Reinforcement Maple) series. According to Canopus: "Through rigorous testing of all combinations in width, thickness and numbers of ply we have established our unique approach to reinforcing shells. Depending on a shell’s diameter and depth, we utilize different reinforcement construction as well as different shell construction. The result is our R.F.M. series that has a bright, solid sound with enough mid-range tone and resonance. We achieved a fantastic core drum sound as well; our maple drums have a wide tuning range, plenty of resonance and an excellent balance with the drum-set. We highly recommend our maple drums for all genres of music". Navel Oil satin finish.