Ultra light 25mm wheels designed for sub 100g F3P planes. The wheels weight 0.35g a pair. To give some comparison, this is 67% less than same size GWS wheels. This model contains 16pcs of the wheels. Note! Due to the small size, the center hole may be partly blocked during printing, but the center will be a little softer so it's easy to find and drill out. Other sizes also available.