The Wallach Reusable Cryosurgical Tips are utilized by the LL100, LLCO2, and the WA100B Cryosurgical Systems. Tips are designed to work in conjunction with the disposable plastic shield (900221AA) which is removed from the cryotip and is discarded after each use. Wallach Plastic Shields insulate the tip and assure proper attachment. 100/BG. Priced per bag. FREE Shipping!