I had a reel of black plastic expandable overbraid which I have used to freshen all my pipework .....it was all in good condition so why buy fancy silicone ones at extortionate prices when this stuff can tidy up the pipework very nicely ....I thought about stainless, but then when I tried this I thought it understates the engine a little which I found appealing ....you all know me by now and I like to be different/challenging ....anyway this is what I mean