MATERIAL: Hollow circular tube made of aluminum metal, lightweight structural raw material OD&ID SPEC: Two standard size combinations: 46mm and 58mm for assembly matching AVAILABLE LENGTH: Two optional lengths including 100mm and 200mm for different production needs PRODUCT FEATURE: Straight tube body with stable structure, easy cutting and secondary machining APPLICATION SCENARIOS: Fit for transmission shaft making, aircraft parts and DIY model projects, Manufacturer: KAPQIN