Anti-vibration pads to reduce vibrations that cause noise when cycling trainers are used. Can be placed on the foot of the cycle trainer. Since it comes in a set of 2, you will need 2 sets (4 pieces), for 3 minoura rollers, 3 sets (6 pieces), for Minnow Hybrids, 4 sets (7 pieces). The effect may vary depending on the environment of use, but the data will cut off vibrations up to 83% when using a fixed roller.