Product: Brake Caliper Seal & Stainless Steel Piston Kit. Model: VT 1100 C 'Shadow Spirit' (Fits Models : VT1100C). Type 316L is an austenitic chromium-nickel stainless steel containing molybdenum. Type 316L is one of the highest specification stainless steels available - superior to both 303 & 304 grade stainless steel.
eBay