Check the listing for details. Vacurect™ Tension System. Condition: New with box. Listed at 14.99 USD. This product will fit on the open end of the Vacurect™ cylinder when creating the erection and will be seated at the base of the penis when you achieve the full erection. Once you find the right size tension system, it should maintain the erection as long as it is in place. It is recommended that you do not leave the tension system on longer than 30 minutes at a time. Please keep in mind that the opening of the tension system is designed to be smaller than the diameter of the penis in order for it to maintain the erection. There are no returns on this product.This product will fit on the open end of the Vacurect™ cylinder when creating the erection and will be seated at the base of the penis when you achieve the full erection. Once you find the right size tension system, it should maintain the erection as long as it is in place. It is recommended that you do not leave the tension system on longer than 30 minutes at a time. Please keep in mind that the opening of the tension system is designed to be smaller than the diameter of the penis in order for it to maintain the erection. There are no returns on this product.