Somebody please correct me-- if that guitar string is 1/8" diameter in 1/48 scale, that should be just over 3" diameter hose in real life? Regardless, it looks good. :thumbsup
... a product called "Ugly Toob" which is a neoprene cord that is very flexible to simulate hoses and such. It comes in various diameters. They also have flexible braided sleeves that are very similar...