This Redwood Internal Door Casing Set is designed for fitting a timber door frame within an internal doorway. Its deeper 132mm section makes it a useful option where the wall thickness requires a wider lining than standard door casings. Made from redwood softwood, the casing has finished dimensions of 33 x 132mm, corresponding to a nominal timber size of 38 x 138mm. Suitable for new door installations and renovation work, the casing provides the framework for hanging an internal door. The timber can be cut and fitted to suit the opening, subject to the dimensions of the supplied set.