If you're working on custom piping or need to connect different sized components, this 90 degree elbow reducer is exactly what you need! It converts from 3 inches (76mm) to 4 inches (102mm) with a leg length of 3.5 inches (90mm) and 0.2 inch (5mm) wall thickness. Made from high-temperature 4-ply reinforced silicone with knitted premium polyester fabric, this thing is built to last. It handles temperatures from -76°F to 374°F (-60°C to 190°C) and pressures up to 80 PSI - meeting or exceeding SAEJ20 standards. The blue silicone is perfect for joining two hard pipes while reducing the risk of connections coming apart or equipment breaking. It's UV and ozone resistant too. Professionals use these in high-performance racing vehicles, commercial trucks, marine applications, agricultural equipment, turbo diesel setups - you name it. Works great with water or anti-freeze like coolant, but heads up - it's not compatible with fuel or oil. Whether you're doing custom turbo piping, intercooler fabrication, DIY intake systems, or radiator cooling work, this reducer elbow has you covered. No logo, just pure functionality that the pros trust for demanding applications.