Soapstone Marker, Flat, 1 2 in W x 3 16 in H x 5 in L, White no checkout Popular regular formula features sanded Popular regular formula features sanded grit with an oil base Effective as an abrasive for loosening grime and dirt on warehouse floors Suitable for unfinished wood or concrete surfaces 000 operations indicating a service life of 10 to 12 years of comparable use Non interchangeable oxygen and fuel gas connectors prevent accidental gas mixing Instant closure on reverse flow check valves with total shutoff at only 10 oz of back pressure For the temporary marking of metal surfaces during welding and fabrication Made of all natural soapstone for superior marking Marks will not contaminate welds and are easily removed Soapstone is packed 3 one gross boxes per case to prevent breakage during shipping Broken cases cannot be provided for this product