Original Kemppi contact tips ensure optimized welding current transfer to filler wire Kemppi contact tips are available for all wire materials in most common wire sizes from 0.6mm up to 1.6mm. Kemppi LiFE+ contact tips last up to 5 times longer than standard copper tips, due to innovative alloying and hardening techniques. LIFE+ contact tips enables longer life especially with globular arc and spray arc applications.