... ) surface treatment:Zinc plated 3) High-density ,factory direct price Track light accessories and parts1.Item Number:DS-T0152.Dia: 10 ... , bending, heading, threading7.surface treatment: Zinc plated, anodize , electroplate;8.package: 200 pcs/polybag, 2,000 pcs/carton;9.material certificate ... military equipment. Any inquiry,feel free to contact us. Thanks. Track light accessories and parts