... . factory, promopt delivery 1. stainless steel round head bolt with inner thread 2. the material can be titanium, copper, aluminium. iron, ... factory in China, and we can provide best price, good quality and service.4. Our products has passed ISO9001:2008 & ... ISO14001:2004 certification, our products have quality assurance.5. finish: zinc plated, Ni-plated, Radiant plated, ...