Many manufacturers just print the double arrows on sector and Trainload Freight loco models instead of providing etched stainless steel ones. To suit 'OO'/'EM' gauge models (4mm scale). The etched range is slowly on the increase too.
4mm scale 'OO' etched stainless steel 6.5mm BR Railfreight double arrows 1 pair.
C&L Finescale 4FP101B 4mm Scale Fishplate Etched Brass 48 Pairs Unused
Scale Link 4mm Scale OO/EM Brass Etch / Fret ref F4 - Cast Iron Style Brackets
3D printed 252 Prototype HSTD Class 41 cab ends 4mm scale OO gauge
DCC Concepts 200g Ballast Tub 4mm Scale / OO Gauge Select from drop down menu
Highland Railway Strath Class Loco Number Plates for 4mm scale/OO Gauge
