Unique Bargains 6.5Ft Long 4mm Inner Dia Auto Blue Silicone Air Line Hose Tube Pipe Made with silicone to increase pressure tolerance resistance to UV water oil/ fuel heat reductions and a life expectancy of the hoses. Improves the flow of the engine system and upgrades the performance. Soft silicone hose ideal for coolant tubes washer tubing wire insulation emission control tube etc. Great for custom turbo or intercooler piping fabrication DIY intake or radiator cooling system etc. A practical performance modification for all types of vehicles. Please allow 5-10mm differences due to manual measurement. Thank you for being so understanding.