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 Superspher® 100 RP-18 endcapped (4 µm) LiChroCART® 250-3 151910
Material Safety Data Sheet or SDS for Superspher® 100 RP-18 endcapped (4 µm) LiChroCART® 250-3 151910 from Merck for download or viewing in the browser.