Waterproof shark fin antenna made from ABS plastic. Coated in piano paint and available in multiple colors. Features a 3M adhesive for secure installation. The bottom hole measures 9.8 x 5.2 cm. Ensure your antenna base is smaller than this for proper fit. For larger bases, consider a different model designed for bigger installations. Includes PET-S antenna cable for improved signal strength. Comes with a color-matched silica gel ring: white and pearl white with white ring, silver with silver ring, gray and dark gray with gray ring, light red and deep red with red ring, and all other colors with black ring. Made of high-gloss, non-fading, durable ABS plastic. Package includes: 1 shark fin antenna, 1 PET-S antenna cable, 1 3M adhesive pad, 1 pair of copper screw and nut. Easy installation: attach the 3M adhesive to the bottom of the shark fin, remove the original antenna, secure the screw and nut onto the original base, align the shark fin properly, and press firmly for 2 minutes to ensure strong adhesion. Dimensions: shark fin length 16.4 cm (6.5 inch), width 7.9 cm (3.1 inch), height 6.7 cm (2.6 inch). Bottom hole length 9.8 cm (3.9 inch), width 5.2 cm (2 inch). Product photos shown for packaging reference.