The safety helmet is made of high-quality aluminum alloy material with strong impact resistance, 4-point cap lining, can adjust the head size to keep the head fit securely, the design is light and comfortable, can be worn all day without any pressure or discomfortName: hard hat/construction hat/safety helmetMaterial: aluminum alloyColor: Silver,Red,Orange,YellowWeight: about 400gSize: length 31cm, width 27cm, height 13cmHead circumference: adjustableApplication: Electric power industry, automobile manufacturing, construction site, oil extraction, machinery manufacturing, steel smeltingFeatures: strong impact, puncture resistance, high temperature resistance, radiation resistance, corrosion resistance, wear resistance, light weight, durablePrecautions:1. Before use, please check the appearance of the helmet for cracks, bumps, unevenness, wear, whether the cap lining is complete, and whether the structure of the cap lining is in a normal state. If there is a performance problem, please stop using it and discard it immediately.2. When wearing a helmet, you need to adjust the headband according to the size of your head and wear it firmly3. After a severe impact, the helmet should be replaced even if there is no obvious damage4. We always strive to provide our customers with the best service and products. If you have any questions or problems after receiving the product, please feel free to contact us directly