Why Choose VEVOR?. VEVOR Air Hydraulic Exhaust Pipe Expander 10t Pipe Stretcher 1-5/8" to 4 1/4". VEVOR Hydraulic Tube Flaring & Expander Kits 3/16"-7/8" 8 Dies 45° Flares. VEVOR Hydraulic Flaring Tool Kit Double Flaring Tool 45° for 3/16" to 1/2" Tube.