Solid plastic ruler with markings available in both centimetres and inches. Contains Biomaster antimicrobial technology which provides protection against the growth of harmful micro-organisms on the surface of your ruler. This is effective for the lifetime of the product. Made in the UK. Please note, the ruler markings are printed along with artwork, plain stock rulers will not carry markings. Design must include wording: ''This product is treated with Biomaster silver biocide tested to ISO2216:2011''. 99% GPPS Plastic and 1% Antibacterial additive.