Ready to use plastic packers ideal for aligning battens, window frames, panels and floors, when fixing them on all irregular surfaces. Accurate and more cost effective than hand-cut hardboard, plywood etc. Colour coded size for easy identification. Thickness sizes (approx. quantities shown in brackets):1.5mm (20), 2.2mm (20), 3.0mm (20), 4.0mm (20), 5.0mm (10) and 6.0mm (10). Packed in polythene bag with header.