18mm Insulation BladesFor: Hook cutter – 20 mm –>Cat No: LWB-3BQty: 3 /PackFor cutting porous or slipper materials, choose these OLFA solid insulation blades. These carbon tool steel blades have a serrated blade edge. Use these blades for cutting materials including insulation, vinyl coated pipe cover, fiberglass, wool, rope and more . (LWB-3B, #1119182)Good For:Cutting insulation, vinyl coated pipe cover, fiberglass, wool and ropePackaged in a plastic container on card hanger