Product Details: - Polycarbonate material - Apply to the PCB Mount Stabilizers - Each package contains 7 sets, 8 sets needed for a 104 keyboard - 3M glue on the side surface for fixing on the side of stabilizers - Only works for unassembled keyboards with a plate - Installation should be careful that the steel wire does not touch the plastic body - Plastic buckle is fixed on the side of the stabilizers - Check carefully that the steel wire does not touch the plastic buckle - If stabilizers are not screwed in, use buckles to fix stabilizers feet - Use a screwdriver to open space for stabilizers' plastic feet, insert buckle, and press tightly with a screwdriver