Spotcheck® SKL WP2 Water Washable Penetrant, 1 gal, Bottle ORS NASCO accurate alignment of carbon pipe accurate alignment of carbon pipe flanges Quick installing pins work as convenient reference points to level flange for tack and weld out — no tools needed Features Acme threads for maximum clamping power Hardened steel for long lasting use Simple operation ambidextrous design makes it easy to use with either hand Grips harder on more materials water washable penetrant that exhibits outstanding penetrating characteristics and discontinuity identification Water wash removable Red visible dye Eliminates the need for solvent removers or emulsifiers in the elimination of excess surface penetrant