The 4 Pcs Gate Wheel Replacement is a set of wooden door support wheels designed to prevent drooping gates from sagging. Made from iron and ABS, these rigid caster wheels are suitable for sliding doors and come in a pack of 4. Manufactured in China, they have a diameter of 0.25 inches and weigh 0.2 kg each. The manufacturer offers a 1-month warranty for these door rollers, ensuring quality and durability for your home improvement project.