Chalgren Enterprises’ reusable bar electrodes are available with tin plated concave 9 mm discs or stainless steel convex discs. Spacing between discs is 30 mm. They are available in a .61 meter (24”) or 1.2 meter (48”) PVC insulated red and black twisted leadwire ending with standard touch proof connectors. A concave version is available with a .91 meter (36”) PVC insulated shielded leadwire. The bar is made of clear polycarbonate.