Dear Sir/Madam We'd like to recommend you a HOT product for your Auto battery : secondary cell indicator.It is a good assistant for your automotive batteries. The details as below: Item Name : Battery charge indicator/PMMP transparenthead with screw/2 Balls/coin type install Item NO:D102 Features: *Determine the battery state of charge at a glance *Indication is based on specific gravity, one of the most stable methods for indication of state of charge. *Will indicate a low electrolyte level. *Reduces the need for OCV (open circuit voltage) testing, thereby saving time. *Reduces customer warranty claims. *Improves customer satisfaction *Size head diameter: Ø 20 head thickness: 4 Packing thickness:2 Screw diameter: M15 Screw pitch: 1.5 Length: 45/50//55/57/60/62/65/68/70 *Packing: 200pcs in a pp bag, then4200in a mater carton. *CTN Dimension:55*55*31cm/4200pcs/ctn *N.W/G.W/CTN:38 / 40Kgs Looking forward to hearing you soon!