The Really Right Stuff Center Column Riser "CCR" is an add-on tripod accessory. This attaches to the platform's 3/8-16" stud and adds an adjustable height of 5.3"-7.2". Made from carbon fiber tubing with anodized aluminum end mounting caps, this riser is both durable and lightweight, with a weight of only 3oz, making it easy to pack & carry in the field. The tripod twist lock system ensures your optics are secure, giving you peace of mind while spotting. Elevate your optics game with our Center Column Riser.FeaturesCNC machined 6061-T6 Aluminum ComponentsCarbon Fiber TubesErgonomic lock knob(2) 3/8" -16 threaded mounting socket