Description Brand New 22mm to 25mm (1 inch) Adapter Attaches a Garmin 22mm cradle to a 1 inch ball socket Description: The 22mm to 25mm ball adapter is perfect for attaching the Garmin 22mm cradle to a 1" ball socket. Note: These only fit GPS devices that utilize the 22mm ball size. Only the items listed in the title will fit this adapter. The majority of Garmin GPS devices use the smaller 17mm ball size.