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C Type Highway Guardrail Traffic Road Crash Barrier Spacer Block. Multi-Size Customization: Available in 35mm, 40mm, 50mm, 150mm, 170mm, and 180mm lengths. Custom Color Options: Available in Green, Yellow, and Blue to meet specific project needs. Multiple Head Styles: Options include Round and Hex heads for versatile installation. High-Strength Material: Made of durable Steel with Galvanized surface treatment for corrosion resistance. Certified Quality: Complies with ASTM, ISO9001, RoHS, and CE standards. OEM/ODM Support: Full customization from samples or designs available. Low MOQ: Minimum Order Quantity is just 1 unit for flexible purchasing. Fast Lead Time: Average lead time within 15 workdays for both peak and off-season.