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 Immobilon® Block - CH (Chemiluminescent Blocker) WBAVDCH01-100ML
Material Safety Data Sheet or SDS for Immobilon® Block - CH (Chemiluminescent Blocker) WBAVDCH01-100ML from Merck for download or viewing in the browser.