This support is used to help prevent prolapse before or after lambing. Once inserted into the vagina it can be tied to the fleece to retain. Or use a piece of old baling twine, to secure in place with a loop around the front legs (under neck) and back to the retainer. Even when used prior to birthing, the exit of the lamb will push the retainer clear. Sterilise and use a lubricant before insertion. Pack of 4 supports complete with tie tapes.