Gravity SP VARI-LEG 01, Levelling Leg for Speaker and Light Stands, Continuously adjustable compensation adapter made of steel and plastic, For almost all tripod speaker and light stands, Compensates for uneven shelves, steps and stairs, Easy installation without any tools, Suitable for all legs with 33 to 37 mm inner diameter, Length adjustable from 340 to 590 mm, Weight: 0.33 kg, Includes spirit level for 35 mm tubes