The Sirui L-10 Monopod Tilt Head is designed specifically for use with Sirui P Series monopods. It has a quick-release base that's compatible with Arca-style plates for convenience, and calibrated mar espandi...kings showing the tilt of the head, from 0 to 90 degrees. A built-in bubble level helps you keep everything on the level. This lightweight head weighs just 11.6 oz and supports up to 33 lb. A quick-release plate is included.