Replace the worn out comfort pad on your Bathmate Hercules Penis Pump for a better seal and improved suction. Over time, the comfort pad will wear, making this 3 pack of replacements the best way to maintain your penis enlarger in the long term. A pack of 3 self-adhesive foam comfort pads for the Bathmate Hercules Penis Pump. Each pad has a complete diameter of 3. 35 inches and an internal diameter of 2. 25 inches.