Wooster, Big Ben, 21", Paint Tray, Large Roll Off Area For 18" Frames, 1 Gallon Working Capacity Saves Time, Designed With Added Stiffness To Allow The Roller Cover To Be Loaded With Paint More Evenly, Handy Edge Compartments Hold Brushes & Tools, Polypropylene Resists Solvents & Paint Buildup, 16" L x 21" W x 4", D.