Thank you for viewing! This was created to prevent accidentally stepping on the wrong switch or stepping on adjacent pedals during studio practice or live performances. I've actually had that experience myself. Dimensions: Φ23 (bottom diameter) x Φ20 (top diameter) x 16 (height) mm *The effector unit itself is not included. Material: PLA Color: Black If you need multiple pieces, please contact me. I will offer a small discount. 2 pieces: 500 yen 3 pieces: 700 yen This is intended for switches with a head diameter of 10mm or less. The switch head may protrude from the prevention adapter. Even if it protrudes, the height is set so that it cannot be turned ON/OFF. The height settings vary depending on the effector manufacturer, but I had no problems using it with the effectors I own. The product may have burrs, layer marks, stringing, chips, and traces of support material removal. Please be aware of this. To avoid trouble, please purchase after you are satisfied. If you have no questions, you can purchase immediately. Thank you.