Check the listing for details. Harris Prime Pre-Filter Pads 5-pack Use with Harris Vinbrite MK3 Filter Kit. Condition: New. Listed at 43.98 USD. Harris Prime Pre-Filter Pads 5-pack Use with Harris Vinbrite MK3 Filter Kit (5X5Pack) 5x Harris Prime Pads pack of 5 - for the Vinbrite MK3 Filter Prime Pads - Coarse Grade Pre-Filter Pads for wine and spirit wash. Harris Prime Pads are a coarse grade pre-filter pad and are part of a system of pads that are available for the Vinbrite Filter. Designed to be used to remove debris before using other pads to finish the wine. They will enhance the overall performance of your Filter by removing larger solids and colloidal particles that may block finer filter pads. You may not notice significant differences in the clarity of your wine after passing through the Prime Pad, but the subsequent flow rate and performance of Filtabrite or Crystalbrite Pads will be improved. Prime Pads can also be used to filter a spirit wash prior to distillation. This will ensure a cleaner wash and reduce flavors carried over from the distillation process.