Bonart Green Electrode Tip Set ART-E1 for Electrosurgery – GT1 to GT9 CE Certified. GT9: Heavy Ball Electrode (5mm, Ref TE0001-512). GT8: Small Ball Electrode (2.38mm, Ref TE0001-502). Theseautoclavable and rust-free electrodes are made fromAISI 420 stainless steel, ensuring durability and precision.