factory direct sales construction helmet national standard material v-type anti-smashing helmet construction site cap labor protection cap printing

thick v-shaped red [release buckle lining]] thick v-shaped yellow [release buckle lining]] thick v-shaped blue [release buckle lining]] thickened v-type white【 release buckle lining]] thickened v-shaped orange [release buckle lining]] thickened v-type red [knob lining]] thickened v-type yellow [knob lining]] thickened v-shaped blue [knob lining]] thickened v-type white【 knob lining]] thickened v-shaped orange [knob lining]]

national standard