4-Inch Heavy Duty Rubber Spring-Loaded Gate Caster Wheel Material: Metal and Rubber Size: 4 inches (10 cm) Color: Black Quantity: 1 Piece Features: Heavy Duty Design: Made with durable metal and rubber, this 4-inch gate caster is built to support gates with a load rating of 50-60kg. Spring-Loaded for Smooth Operation: The adjustable spring bracket allows the caster to absorb shocks and bumps, ensuring smooth movement over rough or uneven surfaces. Universal Mounting: Suitable for both wood and metal gates, this caster can be easily installed with its universal mounting design. Terrain Adaptability: The spring-loaded mechanism adjusts to varying ground conditions, keeping your gate at the correct height during the opening and closing cycles. Versatile Use: Works effectively on various outdoor surfaces, including asphalt, brick, concrete, dirt, grass, gravel, and pavers. Note: Please check the size and specifications carefully to ensure compatibility with your gate system before purchasing.