The Rainin SpaceSaver™ pipette tip rack refills are eco-friendly, compact, easy to use and economical. The nested trays of tip refills not only save space, they reduce plastic waste by 80%. SpaceSaver's outer sleeve and lids are made from highly recyclable Type 1 PETE and made to fit Rainin hinged-lid racks. It is available in LTS and universal-fit (UNV), 8- or 10- trays depending on size.