2-pk (two 10-lb rolls) premium quality flux-cored gasless MIG welding wire 0.030" (0.8mm) wire diameter, 10-Lb roll. AWS Classification: E71T-11. 10-lb weight of welding wire. 8-in spool, 2-in center hole. Self-shielded. No welding protection gases needed. For single pass fillet and lap welding. Packaged in vacuumed and moisture-resistant Aluminum film.