SIP Professional Spotweld 21The SIP Professional Spotweld 21 offers excellent versatility in a range of spot welding applications, particularly where access is limited thanks to its compact, lightweight, and handheld design housing a heavy duty professional transformer. Moreover, the Spotweld 21 is supplied with high quality arms and electrodes. 3800A max. welding current via weld timer operation 120mm arm; 100mm (top) 50mm (bottom) electrode length 1+1mm (mild steel) and 6+6mm