This Caster Wheel is designed to support small and medium-sized robots, offering durability and performance for DIY projects. The wheel is made of white nylon PP material and supported by a metal frame, ensuring strength and reliability. With a diameter of 21mm and an overall height of 33mm, this caster wheel is perfect for the front part of robots, providing smooth movement without scratching the floor. It also features shock absorption capabilities, making it ideal for various surfaces and conditions.