Steel Plate-Mount Stabilizer Set Color: Black Number: 4 x 2U and 1 x 6.25U Size: 2U: 30mm; 6.25U: 108mm Features: 1. The Stabilizers are designed for MX-compatible Steel Plate. 2. Fit for 61 / 64 / 68 / 87 / 104 / 108 Keys Mechanical Keyboard Set. Note: 1. To replace the steel satellite shaft, the shaft in the middle of the satellite shaft should be removed before installation. 2. Make sure that your keyboard is a steel plate or a PCB plate, which is not universal. Package included: 1 * Steel Plate-Mount Stabilizer Set