RGM Painting Knife Plus #081 RGM Painting Knives from $5.56 $8.25 Qty. Add to Cart SKU: RGQ081 This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Length: 2 1/2" Width: 1/2" (6 3/10cm x 1 3/10cm). RGM Painting Knife Plus #81 with dark brown bubinga wood handle. Tweet