Silicone Hose Black 4 - 4,25'' (102-108 mm) Black silicone hose reducer. A straight hose with different inner diameter in both ends suitable for pressure or suction applications, for example between turbocharger and intercooler or between turbocharger and air filter. Also suitable for cooling systems.   Inner diameter 1 (mm): 102 mm Inner diameter 2 (mm): 108 mm Inner diameter 1 (inch): 4 " Inner diameter 2 (inch): 4 1/4 " Length: 100 mm Color: Black Wall thickness: 6 mm Temperature range: -40 to +180 °C Outer diameter 1: 114 mm Outer diameter 2: 120 mm Reinforcement: 5 layers Material: High quality silicone rubber / polyester fabric.