Polycarbin's pipette tip rack is made of 100% circular economy, post-consumer recycled content. Pipette tips do not contain recycled content, and are universal fit, sterile, and certified DNase, RNase, and Pyrogen free. Racked: 96 Tips/Rack; 10 Racks/Pack; 5 Packs/Case. Manufactured in an ISO 9001 compliant facility.