#66 Short-Flange Metal Casing Bead has a short 90-degree turn at the plaster surface for a clean and neat finish at the end of a wall or when adjoining dissimilar material. This product is manufactured with a slight arch in the 1-1/4” long nailing flange to ensure a tight fit. #66 is manufactured from 26 gauge standard G60 hot-dipped galvanized steel. G90 is available upon special request.