Check the listing for details. Replacement Universal-Penis-Pumps Sleeve Donut soft Stretchy Suction Seal. Condition: New. Listed at 4.74 USD. Description 100% brand new and high quality Replacement Soft Sleeve for Penis Pump Vacuum Cylinder Enhancer Toys Connective Silicone Sleeves Penis Enlargement Extender This super soft and stretchy sleeve fits most penis pump cylinders. It is used for adding comfort and creating an airtight vacuum seal. We offer this accessory separately so you can upgrade your existing pump or replace an old donut if it has become worn out. It can also help you sustain an erection, which is important if you wish to increase your size faster.This super soft and stretchy sleeve fits most penis pump cylinders. It is used for adding comfort and creating an airtight vacuum seal. We offer this accessory separately so you can upgrade your existing pump or replace an old donut if it has become worn out. It can also help you sustain an erection, which is important if you wish to increase your size faster. Material:Silicone Safe material Size：As Pic Package included:as you choose ( Not included the cup)