Benchmark Scientific H1000-MR-CMB Combo for 125 mL, 250 mL, and 500 mL. Change the capacitiy and capabilities of your shaker with these parts and accessories. Compatible with Benchmark Incu-Shaker™ Mini Incubating Shakers sold separately as 51705-01 and 51705-03. The convenient MAGic Clamp™ platform is suitable for use with Erlenmeyer flasks and test tube racks. The unique, magnetic attachment method is the easiest way to instantly change between flask clamps of different sizes.