Ergonomic design with rigid 21 gauge, polished stainless steel. Heli-arc welded end caps provide outstanding strength and water-tight seams. Straight, sheared edges for fast, easy and clean putty knife swipes. Seamless inside corners so no material can collect. Contoured bottom for a comfortable grip, as well as easy mixing and cleanout. Designed for all-day use with less fatigue. 16 inch (400mm) in size.