Wallach's disposable, extra rigid loop and ball electrodes come in a single, sterile package with five packages to a box. The extra rigid series is designed to prevent undesirable bending while cutting. A variety of loops, squares and balls are available in high quality tungsten wire. A special value brand of disposable loops and balls is also available. Unless otherwise specified, all shaft lengths are 12cm. Loops are interchangeable with any electrosurgical unit.