Wheel stand/wheel racket 1.Material:Aluminum&mild steel 2.Process:CNC mahining&bening&anodizing The balance tolerance is within 0.05mm.The following website is the video of the balance testing,please take a look. http://v.youku.com/v_show/id_XMTQyMTI4NTQ0.html Welcome to inquire. We can develop and produce according to your drawings or sample. Contact person:Athena