2 pieces of 304 stainless steel capillary tube wire protection tube outer diameter 4mm x 3mm inner diameter length 250mm
https://www.vogueparade.com/shopping/EN/200282142/1/1005001529122168/2-pieces-of-304-stainless-steel-capillary-tube-wire-protection-tube-outer-diameter-4mm-x-3mm-inner-diameter-length-250mm//