Features: Insulating tray allows for quick battery removal and then insertion of a new battery that can be securely fastened. Simple and convenient. Ideal for batteries installed in tight spaces. Quick release car battery clips. These are only suitable for conventional round terminal batteries. Specifications: Material: Plastic and Metal Color: Red and Blue Quantity: : 1 pair Inner Diameter (Positive): 19 mm Inner Diameter (Negative): 17 mm Package Includes: 1 * Pair of Battery Terminals (one is red and the other is blue) Purpose: Our commitment is to provide our customers with high-quality products and services. Meeting customer needs is our unremitting pursuit.