Sachtler Mid-Level Replacement Spreader for Sachtler OB 2000 Tripod Legs The Sachtler Mid-Level Replacement Spreader for Sachtler OB 2000 Tripod Legs perfectly replaces the original mid-level spreader that came with your OB 2000 tripod legs. The spreader is adjustable and provides stability to your tripod legs, even when set up on uneven ground. The mid-level spreader allows you stabilize your legs, even when working on uneven ground or stairs, which can be problematic when using a ground spreader. Each arm of the mid-level spreader can independently extend from about 13.5 to 18.9". This allows you to stabilize your tripod, even when the legs are not evenly spread.