A heavy duty door threshold plate. This ribbed profile threshold is available in aluminium and solid brass. When exposed to weather, the brass version will in time turn to a bronze finish. Location Door sills. Sizes Available in stock lengths. Standard Finish Aluminium anodised 25 microns. Satin Clear (Silver), Bronze or solid brass finish. Fixing Method Zinc plated, cross recess head S.T. screws of the appropriate size and colour are supplied. (Brass version has brass screws). Used in conjunction Raven Door bottom seals. Note: Solid brass version does not have sill gaskets. Approvals Access & Mobility  UK/EU: Conforms to Approved Document M.