Modeled after the popular Orbi-Shaker, the Benchmark Scientific BT300 Orbi-Shaker JR. is a "mini-sized" replica, designed for smaller capacity applications and laboratories where bench space is at a premium. The BT-300 Orbi-Shaker Jr. includes a 9.5 x 8" platform that mixes at a 19mm orbit, perfect for thorough mixing and aeration in Erlenmeyer flasks. An optional MAGic Clamp™ platform is available 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.