PVA bag stems are used in carp fishing as a baiting method. These stems come in two different sizes, 70mm and 85mm, to accommodate different bait sizes and fishing techniques.
The PVA bag stems are made from a water-soluble material that dissolves when in contact with water, making them ideal for use in fishing. Anglers can place their bait in the PVA bag, attach it to the stem, and then cast it out into the water. As the stem dissolves, the bait is released, attracting fish to the area.