Replacement thermal transfer print head compatible with GT420T, GK420T, GX420T, and GT450 printers. Part number KD2004-DF54, also known as 105934-038. Designed for 203 dpi printing. Compatible with GK888T, GK888D, GK888TT, GK888CN, ZP888, TLP2844, and LP2844-Z thermal printers. Also compatible with P300, P310, P320i, P330i, P400C, P420, P430i, P500C, P520C, P520, and P600C card printers when used with 800015-101 black ribbon. Disclaimer of Affiliation: This is an aftermarket component. Brand and model mentions are for illustrative compatibility only.