4Pcs 1/8 17mm Wheel Hex Hub 37mm Extension Adapter Combiner Coupler for RC Car Description: brand new and high quality Feature: Made of high quality metal material Easy to install and durable in use Make your RC car more cool and attractive Specification: Material: Aluminum Alloy Color:Red,Orange,Blue,Purple Pin Lenght: 14mm Pin Diameter: 2.5 mm Hex Diameter M17: 17mm Inner Diameter: 8mm M37 Extension: 37mm Anti-Dust Cap: 12mm Quantity: 1set(4pcs) Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 4 x Anti-Dust Cap and Wheel Adapter 4 x Pins 4 x Rubber Ring(other accessories demo in the picture is not included.)