Pearl OptiMount Suspension System I am selling this because I used to use it but no longer do. The following is the manufacturer's description: Pearl mounting system. It is fixed to the four lug nuts of the tom-tom through rubber cushions, allowing the tom-tom body to be suspended. It draws out the natural sound of the tom without putting stress on the hoops or tension bolts. Specs ■Type: OptiMount Suspension ■For 7" and 8" depth ■Pearl's original mounting system that draws out the natural sound of the tom-tom without putting stress on the hoops or tension bolts by fixing it to the four lug nuts of the tom-tom through rubber cushions and suspending the tom-tom body. ■For CMN/CC/RF/RFP/MMP/MRP/MPL/MRV/MRS