The SIRUI SC-BP/BPS Compatible Baseplate is built for cinema camera operators who need a durable, quick-release mounting point that works across ARRI dovetail plates, tripod heads, and stabilizers. 15kg Max Load, Hollow Aluminum Alloy Design: Keeps the baseplate lightweight (465g for SC-BP, 650g for SC-BPS) without sacrificing strength. SIRUI Patent Quick Release System: Inserts and detaches equipment in about 3 seconds with a double-insurance locking system to prevent accidental sliding. ARRI Dovetail Compatible: Also mounts to other quick-release plates via a 1/4-20 or 3/8-16 threaded hole on the bottom. Universal Accessory Mounting: 1/4-20 and 3/8-16 screw points attach 15mm rod-mounted accessories to the rig. SC-BPS Kit Adds Carbon Fiber Rods & Lens Support: Includes two 15mm carbon fiber rods and a Y-shaped lens support for lenses 50-140mm in diameter, adjustable over a 55mm range. SC-BP Weight 465g SC-BPS Weight 650g Max Load 15kg Baseplate Threads Two 1/4"-20, one 3/8"-16 (min. 38.5mm/1.52in apart) SC-BP Box Contents Baseplate with Dual Rod Clamp, Side Release Arca-Swiss Quick Release Baseplate + Plate, 5x 1/4-20 Screw, 1x 3/8-16 Screw, Allen Key SC-BPS Box Contents SC-BP contents plus Y-Shaped Lens Support and 2x 15mm Carbon Fiber Rods