Platform Head Snap-on. For use with microplate insert (58815-182) 60-microtube insert (58815-206) two-tier insert for microplate (13500-962). For use with Vortex-Genie 1 Touch Mixer (14216-184 -182) and Vortex-Genie 2 and 2T Mixers (58815-234 -232 and 142