Features: The Magnetic Cup Holder for Tractor is made of Stainless Steel Material, which is durable. Keep your drinks within easily reach while driving with the Durmmur Magnetic Cup Holder - a must-have accessory for any vehicle! This versatile cup holder is designed to hold most 10-40 ounce bottles with a diameter of 3.22 inches, and features a powerful magnet that can attach to any ferrous metal surfaces Perfect for busy commuters, truck drivers, farmers, and anyone who spends a lot of energy on the road, this magnetic drink holder is a practical and convenient solution for keeping your beverages secure and accessible while you drive. The powerful magnet attracts to any ferrous metal surfaces, Not Suitable for Aluminum Surfaces or Stainless Steel Surfaces. Specifications: Material:Metal Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Cup Holder