Air over hydraulic disc brake on 4 wheels system and expire brake is used in brake system, which has large brake force and makes stable brake and high safety.
High-Strength Metric Class 10.9 Steel Flanged Hex Head ScrewsChoose these Class 10.9 steel screws for high-stress applications, such as valves, pumps, motors, and automotive suspension systems.They are at least 25% stronger than medium-strength steel scre