Description: Material : 100% silicone made,soft and elastic. Operative temperature: -40 to 220 Centigrade (428F). Working Pressure: 0.3 Mpa to 0.9 Mpa (43.5PSI to 130.5PSI). Color available : blue, black. Inner diameter: 6mm ,4mm, 8mm, 10mm (This is the price of 1 meter, if you want longer, you can told me) Package Include: Silicone Vacuum Tube Hose Due to light or computer monitors and other reasons, there may be a slight color difference, thank you for your understanding.