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Evening_Foundation_8 posted on r/puffco2d
Ceramic Hot Knife Tip,Multi-Tool... https://www.amazon.com/dp/B0CYH74M39?ref=ppx_pop_mob_ap_share Been using these for years. Fits any regular ol cart battery you got lying around. You get 2 for LESS then $20 bucks . And much better build than these overpriced Puffco ones.