If you use our smaller-sized Hydro-Bats in your studio, you will find that some of them need an adapter to properly fit on your pottery wheel. Because the pins on your pottery wheel head are typically 10" apart, it's a necessary accessory when you use our 6", 8", or 10" Hydro-Bats. The adapters are easy to use -- simply place them on your wheel like a regular plastic bat, and then place your smaller Hydro-Bat on the adapter’s pins.