CNC-machined LEFT back bulkhead for XRAY X1216 made from premium extra-strong Swiss 7075 T6 aluminum, black coated for very long life and fashionable appearance. Strategically machined for paid off fat while keeping energy. Smart pod design enables super-easy motor top access, accommodating brushed or brushless motors. Updated design enables ultra-low back suspension CG and very quick & easy trip height modification. Ride height shims are inserted between your bulkhead and top bulkhead clamp. Is employed with right back bulkhead #373013.