I purchased the 350mm for my 8x16 lathe and while I could have used maybe 370mm these just barely fit with the splash guard in place. They look and feel extremely well made vs the 100mm TOAUTO brand I purchased and the default pinout worked perfectly with my Ditron D80-2A(Ditron seller included ribbon cables for glass scales as my unit was default for magnetic Ditron scales vs glass). The TOAUTO unit scales needed to be completely rewired but I eventually figured out the ribbon cable PCB side plug was basically DB9's 1-9 from left to right at the PCBs end connector which is a JST-XH 9 pin. The first picture is the pinout for the "Cozyel" brand scales.