g pen melt hot knifeG Pen Melt Hot Knife The G Pen Melt Hot Knife is a compact electric hot knife made for cleaner concentrate handling. It uses an instant heat ceramic tip, so concentrates melt off the edge with more control and less mess than a cold tool. That helps reduce wasted material and speeds up prep when staff or customers want quick loading. Melt is built to stay small and portable, with a size of 3. 94 in x 0. 5 in x 0. 25 in. That is about 10. 0 cm x 1. 27