Sizes: Diameter 12mm - 25mm, Length 400 - 900mm www.sig-ca.co.uk Reinforcement & Formwork Stainless Steel Dowel Bars Supplied sawn cut to order to your specific lengths. All diameters from 8mm to 40mm can be supplied. Dowel Bar Sleeves A flexible PVC sleeve to DOT specification, in diameters 12 - 32mm .