The 438 is fitted between tripod and head and provides easy, fast leveling for tripods without built-in leveling mechanisms. Its range of movement is 10°. Manfrotto 438 Replaces: 3502 Specifications: attachment (bottom): 3/8" female thread attachment type attachment (top): 3/8'' screw attachment type bubble spirit level (no.): 1 number color: black color front tilt: -5° / 5° tilt range height: 1.97 in load capacity: 33.07 lbs material: aluminum weight: 1.43 lbs