Chain sprocket 1)ISO9001:2008 tested 2)20 years' experience 3)Factory directly sale 4)CNC lathes, CMM,hardness test chain sprocket1.Sprocket block, produce according to different requests.2.material:aluminum3.application:Automobiles & Motorcycles4.surface treatment:sand blasting,powder coating, polishing,painting.5.small orders are welcomed.6.24-hour service with prompt reply.7.prompt dilivery ...