Bulk pipette tips are sold in resealable bags of up to 1,000 tips. Buying Rainin BioClean Ultra tips in bags to fill empty racks is the most economical way to get high-purity, high-cleanliness tips. 10 µL to 20 mL, LTS and UNV (universal). Unfiltered, non-sterilized tips only. Up to 1,000 tips per bag depending on tip size.