Level 5 MEGA Flat Box 10"The Level 5 Tools Mega Flat Boxes hold 50% more joint compound than the traditional designs. These boxes feature a high quality anodized aluminum construction and traditional brass blade holder with stainless steel blades. The adjustable crown dial ensures the precise amount of mud is delivered to the wall. All wear parts fit most competitive brands at significantly lower prices vs. the competition. Available in 7", 10", and 12" sizes.