The AA29 Micro-Temp Cautery with a Vasectomy Tip from Bovie is a battery operated cautery for pinpoint hemostasis. The AA29 is a High-Temp (2,000 degrees F) cautery. This disposable cautery is lightweight, has consistent temperature and allows for minimum trauma to surrounding tissue. A locking safey cap prevents the cautery from being turned on accidentally. There are 10 sterile cauteries per box and they have a 4 year shelf life.