The ServoCity 3.00" Foam Wheel (2 Pack) features a 16mm hole pattern, designed for compatibility with various mechanical assemblies. These wheels are crafted from foam, offering a lightweight solution with a total weight of 1.23 ounces. They are engineered to be adaptable with goBILDA® hubs through the use of specific adaptors and hardware, ensuring a secure and stable connection. This product is ideal for applications requiring a balance of durability and reduced weight, making it suitable for a range of robotics and mechanical projects.