Profile: R and A Precast is a manufacturer of reconstituted stones. We specialize in windows cills, balustrades, lintels, keystones, wall quoins, door surrounds, pier coping, and wall coping stones. Our lintels include two types: plain and splayed head types. Our splayed head can be used as it is, or with an integral keystone. Our columns include hollow core to enable the use of either a steel support or reinforced concrete. Our window cills are designed to suit either one or two brick course.