Features: This pair of battery post adapters connectors offers an easy way to retrofit your vehicle battery for more convenience on connection and use. It contains 1 positive terminal post adapter with a larger diameter of 17-19mm, and 1 negative terminal post adapter with a smaller diameter of 15-17mm. Solid brass material, anti-corrosion, sturdy and long lasting. Matched stainless steel bolts make it easy to connect. Washers included ensure a tight connection. Specifications: Material: Copper Color: Yellow Size: 4*2.2*2cm / 1.6*0.9*0.8in Male / External Thread Size: 0.6*0.8cm / 0.2*0.3in, M6 Female / Internal Thread Size: 0.8*1.9cm / 0.3*0.7in, M8 Quantity: 1 Pair / 2 Pcs Notes: Due to effect of light, camera and monitors, the item’s real color may be slightly different. Allow slight dimension difference due to manual measurement. Thank you for your kindly understanding. Package Includes: 2 PCS Battery Terminal Post Adapters (Others are NOT included)