Zipper design on both sides of the hem makes driving more convenient.The inner layer of the hat is made of GP velvet fabric, which is soft and skin-friendly. The fabric has been processed with advanced treatment, so it does not have balls or hair!
Portable residual chlorine analyzer colorimeter LH-C10 is mainly use for rapid test to get the chlorine ion concentration in the water, using international standard method. It is eco-friendly, the test is fast and the result is accurate.