Description: Hose is made of PBT inner hose + X braided layer + PVC outer layer. PVC material coverage: The surface of the hose is covered with a new PVC material, which is resistant to cold and heat, tearing, stable chemical performance, corrosion resistance, and suitable for mineral oil and DOT oil. X-type braided layer: increase the strength of the hose, and strongly protect the inner tube from deformation and breakage. PBT polymer inner tube: high strength, stable performance, small creep, no oil leakage for long-term use. Olive and Connecting Insert Kit: high-purity copper olive and connecting insert, high weather resistance and airtightness after pressing and deformation, wider applicability to various brake fluids, no need to worry about its aging and oil leakage. Specification: Diameter: 5mm Package Includes: 1 Piece Bicycle Hydraulic Disc Brake Hose 2 Pieces Bicycle Olive 2 Pieces Connecting Insert 2 Pieces Seal Rings(2 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!