a bent copper tube of small diameter. the end of the tube is raised.

texture brown closeup copper background bent tube thermal conductivity electrical corrosion resistance malleability bent power decoration copperplate alloy copy space green energy grunge industrial industry metal metallic raised surface technology textured wallpaper blank heating ventilation air conditioning plumbing heat exchangers non-toxic water system medical gas systems soldering long lifespan antimicrobial eco-friendly recyclable high pressure cost tool equipment object small diameter