Fine Compound: Professional tool for commercial or occasional use. Green polishing compound. Suitable for FINAL stage polishing of copper, aluminium, brass and all other soft metals. Recommended for use with final finishing floppy buffing wheels. Total weight of the bar 1100 grams. Total dimensions of the bar 9" (length) x 2.5" (width) x 2" (height). Medium Compound: Professional tool for commercial or occasional use BLUE polishing compound Suitable for second stage polishing of copper, aluminium, brass and soft metals Recommended for use with stitched / medium buffing wheels Total weight of the bar 830 grams Total dimensions of the bar 7" (length) x 2.5" (width) x 1.5" (height) Coarse Compound: Professional tool for commercial or occasional use Brown polishing compound Suitable for first stage polishing of copper, aluminium, brass and soft metals Recommended for use with spiral / coarse stitched buffing wheels Total weight of the bar 680 grams Total dimensions of the bar 7" (length) x 2.5" (width) x 1.5" (height)