... 2, environmental protection among circle.Inside 3, sizes 1",1.2",1.5",2",2.5",3".. Activities can be ... plating /oxidation/ polishing paint (any color)3,Size :Each product has universal sizes in accordance with international standard ... : We can pass through environmental test, and we can provide the ROHS, SGS test reports, etc5,OEM : We ... us at any time....... ring binders,home range,swivel shackle