Convenient, wear-resisting, durable. Heavy Duty pre-drilled with fixing holes. Type:Spring Loaded Gate Wheel Wheel Diameter :100mm Spring shock absorption load 60kg. Overall Height :270mm Package Includes::1 Door wheel Note: Transition: 1cm=10mm=0.39in Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.