Bovie ES13 Electrosurgical Loop Electrode (20mm x 15mm). Aaron LLETZ Loop electrodes feature tungsten wire for superior shape and integrity throughout the excision procedure. Loops are packaged in a patented protective tray to prevent damage during shipping. Designed to fit all standard pencils that accept 3/32" (2.3mm) electrodes. 5/BX. Priced per box. FREE Shipping!