Magnesium Alloy Suction Cup Pad Mount has a base made from Magnesium Alloy allowing to be one of the lightest and strongest suction cup pad mounts on the market for its size. This suction cup pad mount comes with an EPDM pad on the bottom for A Super strong suction mount. These suction cup pad mounts are used on many track events and for drifting,high speed runs and other various video recordings. This unit here is just the base model part with no other components included besides 1 (20/21mm CNC machined ball adapter). The included 20/21mm ball is CNC machined from aluminum alloy making it a very strong ball mount so your gadget does not slip at high speed runs or drift events on your vehicle.. This suction cup pad mount comes with the option to mount two arm mounts as the base comes with a 20/21mm ball adapter and one extra one for adding another arm or simply combing this with other suction cup pad mounts for extra strength of you need to do so. You have the option to use2,3,4,5,6 or as many suction cup pad mounts as you wish by using the extra 1/4" thread included to attach either other suction cup pad mounts or other arms. Once you have used these suction cup pad mounts you will know why others don't come close. When using make sure large surface area is clean and flat. EPDM pad can be washed and rinsed only using water and allow to dry after. No Arms or adapter are included with this suction cup pad mount. This is only the suction cup pad mount being sold for this price.