The spring guide has a stainless steel inner core with an aluminium outer cover. Comes with a stainless steel 8 ball trust bearing. Suitable for the majority of non-QD V3 gearboxes. The top shroud screws onto the core and locks the cover in place. 50mm in total length. M5 thread.
Please note if you're replacing a stock spring guide without a thrust bearing, check to see if your piston head has a bearing. I recommend you only fit a single thrust bearing.