Made of premium silicone material to ensure strength and durability Broad operation temperature : -76F to 374F (-60C to 190C). 60 PSI Maximum pressure rating Work pressure: 0.3 to 0.9 MPA. Min temperature: -40 C. Max temperature: 220 C/428 F. Bursting Pressure: 2MPA. Inside Diameter: 1/4" (6mm). Outside Diameter: 12mm. Length: 20 Feet (240 Inch). Wall Thickness: 3mm. NOTE: this is 20 feet long sections of vacuum hose for each order. Example: If quantity of x2 is ordered you will receive x2 20 feet sections of vacuum hose We provided 12 months warranty from the date of purchased and Free return within 30 days NO QUESTION ASK.