Product Name: HelmetMaterial: ABS engineering plasticHead circumference: 57-58cm, 59-60cm, 61-62cm, 63-64cmSize: 35* 27 * 26cmNet weight: 1.4kg±50gColor: A, B, C, D, EMeasurement methods:Use a soft ruler to pass the forehead (above the brow bone) and the head at the back of the head through the week and calculate the hair.Disassemble the lens:1. Align the handle with the groove of the lens base2. Gently rotate the base and rotate it several times until the base is released3. Pull out the base and you can remove the lens and remove the other side of the lens in the same way.
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