Lot of 2 DuPont Instruments Swing Bucket p/n 11053 with 2 Sorvall Instruments p/n 00884 10-well Rotor Adapter Bucket Inserts. Both the buckets and adapters are in used condition, some moderate cosmetic wear may be present. Diameter of holes for centrifuge tubes is about 18.15mm. 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!