V-200 Cole-Parmer® Stuart™ Vortex Mixer provides rapid mixing of samples contained in test-tubes, small flasks and bottles. Mixing speed can be selected from 200 rpm for very gentle mixing to 2500 rpm for vigorous agitation.rHeavy die-cast body for stability during use.rChoose between 'touch' mode or continuous operation simply by pressing a button on the fascia. A special retort rod holder allows mixing vessel to be placed secured on the mixer for long-term mixing application. rThe V-200 can mix a variety of other vessels when used in conjunction with the accessory pack detailed below. rAccessory Pack r- Plastic cradle for standard microtiter plate r- Circular foam insert for beakers and flasks (up to 500 mL capacity) r- Rectangular foam insert (holds 8 x 0.2 mL, 8 x 0.5 mL and 16 x 1.5 mL microcentrifuge tubes) r- Solid rectangular foam insert (blank for custom holes)