Racing titanium bolt and nut in color 1) Size:M3~32 2) Grade:Gr5 3) Color: ... head5.Surface Treatment: Polishing, Anodizing, Black oxide6.Material: Titanium alloy and pure titanium7. Applications: Chemical industry, Medical field, Aeros pace or ... boat and medical industry etc8. Customer service : Our quality of service,reliable credit and sincere hope that new and old customers at home and abroad and ...