Custom Premix Selecting "Custom Premix" option means that all of the beads you have chosen will be premixed in manufacturing before the kit is sent to you.
Safety Data Sheet for ECM Cell Culture Optimization Array (Colorimetric, 96-Wells) ECM541
Material Safety Data Sheet or SDS for ECM Cell Culture Optimization Array (Colorimetric, 96-Wells) ECM541 from Merck for download or viewing in the browser.