
Size matters. Someone wrote earlier about this product that the nozzle hole diameter. is 1.2mm, which could be more for a 50A plasma cutter like the LTP5000D (red model). My parts fit exactly 1.2mm (drill size 56). In my case it was good. These bits cut much better and last much longer on my 50 amp machine than the previous replacement bits I've used (from another supplier) which to my great surprise have a 1.4mm bore. (drill size 54). So size matters, in this case smaller is better and as little as 0.2mm makes a big difference. At $1.40 per nozzle this is a great buy.