About this item Still Worried about HOW TO Find The RIGHT Direct Replacement Radio Antenna Mast for Full-Size and Heavy-Duty Pickup Trucks? Here is a New Black Short Spiral Antenna Mast - LONG about 7.36 x 2.8 x 0.79 inches. Easy Installation, No Modification Required, Material: High Quality Copper-Plated Stainless Steel Core + Copper interface + Surface Flexible Rubber. Pros: Sleek Durable Look, Car Wash Safe Proof, Good Reception Proof for Fits for Chevy Silverado 1500/2500HD/3500HD, Fits for GMC Sierra 1500/1500HD/2500HD/3500HD/Denali Pickup, Trucks All Models with a Screw-on Antenna Base. Dimensions: 7.36 x 2.8 x 0.79 inches.