Description: Material : 100% silicone made,soft and elastic. Inner Diameter : 3mm / 4mm /5mm/ 6mm / 8mm. Operative temperature: -40 to 220 Centigrade (428F). Working Pressure: 0.3 Mpa to 0.9 Mpa (43.5PSI to 130.5PSI). Color available : Red, Blue, Black 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.