Postalloy 53 Speaker & Subwoofer Boxes Glove PPE Compatible Punches tip diamerer 3 Glove PPE Compatible Uses: Tool Grinding Edge Shaping and other Heavy Material Removal tasks_x000D_ POSTALLOY 53SPL is a solid gasshielded welding wire isdesigned for joining and buildup on various types of cast ironsuch as ductile nodular gray and Niresist Also for weldingcast iron and cast iron to steel or stainless steelThe unique chemistry of POSTALLOY 53SPL providesweld deposits that are fully machinable Under normalcircumstances if dilution is kept to a minimum there is noundercutting and weld deposits can be machined through thefusion zone even with high speed steel tooling