Pre-order Only SMALLRIG FS7 Battery Plate Mount Adapter 1741 is an adapter plate which connect the battery plate and the Sony FS7 cage. Attach it to the rear of your FS7 with two M4 screws, then you can mount the SMALLRIG Battery Mounting Plate 1530 to it for connecting the external power station. Notes:1. Please pre-order and complete payment, you can cancel it before shipping out and get full refund, no handling fee. And we can not offer 50% discount once pre-order closed.2. Pre-order items are unavailable at present, if you order the pre-order items along with other items available, we will dispatch all the items after the pre-order items come out. So, if you need other items urgently, please order them separately.3. Since all pre-oder items are 50% discounted already, there is no extra discount for all our resellers.