Easy Armboard with Trigger. Armboard measures 26″ x 51.2″ (66 x 14 cm). The pad width measures 6″ (151.4 cm). Patient Weight Capacity: 400 LB. With the trigger design, simply pull the radiolucent release mechanism for full articulation and release it to lock. A spring lever accessible from both sides securely locks the armboard to the rail and reduces the uncertainty of gravity locks. UOM: