This high-quality RADNOR™ PEAK™ plus .045" diameter ER308LSi Stainless Steel MIG Welding Wire is packaged in 33 lb spools for use in the construction industry or for those who use larger quantities of MIG wire filler metal. 308LSi HiSil is a stainless steel solid wire with 308L chemistry that has been modified to offer a higher silicon level for increasing weld puddle fluidity, as well as for ensuring tie-ins and potentially higher welding speeds.