Thermo Forma's stainless steel rack holders feature a patented adjustable mechanism that permits selection of 6 different shaking angles, and "snap-in" product carrier rack placement. Two varieties of rack holder are available, universal and dedicated. The universal rack holder will accomodate all four test tube racks and both microplate racks, while the dedicated racks are designed to accept only one size of test tube rack.
Dedicated rack holders come complete with a test tube rack; racks for universal rack holders must be purchased separately.