Safety helmets must be worn on this site sign

Safety helmets must be worn on site sign. Part of our building site safety sign range, to instruct workers and visitors that head protection hard hats must be used to prevent any injuries from overhead hazards or falling objects. Building site safety signs. Mandatory safety sign safety helmets must be worn on site. Compliant with ISO EN 7010 and Safety Signs and Signals Regulations 1996.MS4000 Size 450mm x 600mm. Material self adhesive vinyl.MS4001 Size 450mm x 600mm. Material rigid plastic.