Sierra Silicone Single Hump Hose CouplerThe Sierra Silicone Single Hump Hose Coupler has a blue silicone cover with a smooth finish for easy clean up and fabric reinforced. The hose remains stable at elevated temperatures and provides angular and longitudinal vibration absorption in wet exhaust systems. Features: Shields couplers correct slight offsets in pipes; Resistant to exhaust fumes, ozone, mild chemicals, antifreeze, and saltwater; Single Hump; Temperature ranges from -20F to 350F; Meets SAEJ2006 Type R1 standards; Specifications: 4" x 6"; I.D.: 4" or 102mm; Length: 6" or 152mm; lbs: 2; 5" x 6"; I.D.: 5" or 127mm; Length: 6" or 152mm; lbs: 2; 6" x 8":; I.D.: 6" or 152mm; Length: 8" or 203mm; lbs: 2; 8" x 8"; I.D.: 8" or 203mm; Length: 8" or 203mm; lbs: 3; 10" x 12"; I.D.: 10'' or 254mm; Length: 12'' or 305mm; lbs: 4;