As one of the best selling products in our company, the customer CENTURY have purchased a big order of HD-305 ACID LEVEL INDICATOR 110MM for a 40HQ container. The customer has been purchasing this product from our company, and the purchase volume is large every year. As a professional battery accessories company. All the products of our company are of high quality. We can also provide all kinds of battery accessories. Please feel free to contact us if you need.