Senior Hydraulic Pipe : Exclusive patented design double-layer reinforced layer with high-denier strong industrial filament winding layer and Kevlar braiding layer to effectively reduce the expansion coefficient and increase oil pressure efficiency. The use of PVDF inner tube and nylon outer coating, its oil resistance, high chemical resistance, weather resistance and heat aging and other material properties, comprehensively enhance the safety of the hydraulic pipe, and thus enable the rider to effectively reduce the braking force. Handle to the brake. Layers: 4 layers Material: PVDF+ High Density Industrial Wire Winding + Kevlar Braiding + Nylon Diameter specification: 2.1mm*5.0mm / 2.3mm*5.0mm / 2.5mm*5.4mm Colors: black, white, red, pink, orange, yellow, fruit green, blue