These AWE22 FS Spot Welding Electrodes are Battery Nickel Tabs Spool, with any size width, thickness from 0.1mm, 0.15mm, to 0.20mm, etc. Materials including pure nickel spool, #430 stainless steel plate nickel spool, general steel plate nickel spool.Automated precision resistance spot welding equipment for battery packs, electrnic, hardwares, sensors,etc.