Material: Ordinary lead-free white copper (single/double tooth)

Material: 18 nickel lead-free white copper (single/double tooth)

Material: Stainless steel 303CU, stainless steel 316L (single/double tooth)

Material: ordinary lead-free white copper, 18 nickel lead-free white copper, stainless steel 303CU, titanium, stainless steel 316L (single tooth/double tooth)