Lot of 4 various Sorvall Instruments Rotor Swing Bucket Adapter inserts. These adapters fit DuPont Instruments Swing Bucket p/n 11053. Includes: 1 x 1-well (~62.13mm diameter) 1 x 1-well (~44.90mm diameter) 1 x 20-well (~16.34mm diameter) 1 x 35-well (~12.56mm diameter) All the adapters are in used condition, some moderate cosmetic wear and discoloration/staining may be present. 30-day money back guarantee. If there is anything wrong with the item that you have purchased, please contact us directly and give. us a chance to help, we respond quickly and will ensure you are satisfied with your purchase and experience! Please do not leave negative feedback or open any disputes with eBay or PayPal. Contact us directly and we will fix the problem quickly. Fast & free shipping. We strive for 5/5 Star service!