For steel products: (1. ) seamless steel honed tubes/internal honed with external hard chromium plate tube/internal honed & hard chromium plate tube jis stkm 13c (2. ) high-carbon anti-friction bearing steel bar/hollow bar suj-2 (3. ) induction hardening chromium plate bar sae 1045/jis s45c/din ck45 For aluminum products: (1. ) aluminum alloy tubes for pneumatic cylinder a6063 t5 (2. ) aluminum alloy profile tubes for pneumatic cylinder a6063 t5 For stainless steel products: (1. ) stainless steel chrome plate rods/grind rods type sus 303/304/316 (2. ) stainless seamless steel honed tubes/extra-thin seamless steel tube sus 304/304l/316/316l (3. ) stainless seamless/welded industrial steel pipes astm a312 (4. ) stainless seamless/welded steel sanitary tubing astm a270