Made of high-quality metal that is sturdy, rust-proof, and reliable. All parts are of high quality, durable, and suitable for long-term use. The complete set is ideal for changing or replacing: The workmanship of all parts is high-quality, durable, suitable for robust use, and should not be missing from any repair kit or accessory set. High-quality & reliable: Used to replace the old valve core to stop air leaks. The workmanship of all parts is high-quality, durable, and suitable for robust use. This bicycle valve insert set is ideal as a replacement and should not be missing from any repair kit or accessory set. Easy to use: You can complete the replacement in just a few seconds. Ideal replacement for your old-style German or English bicycle valve. Consisting of 16 parts: 4x quick-release valves (valve cores) + 4x valve caps + 4x union nuts + 4x rim nuts. It is ideal as a spare part, replacement, change, and repair kit for all tires and wheels with DV Dunlop, quick-release, standard, or Dutch valves.