AHI have over 15years experience in high precision mechanical parts since 2005.Currently we can meet 0.001mm roundness & 0.002 mm cylindricity tolerance.AHI Focus in two industries :1. Diesel fuel injection partsDiesel injector, injector connector tube & plunger element etc.2. Hydraulic partBushing & plunger,plunger element,control valve, Servo piston etc. AHI products are widely used in construction Machinery Parts,Wind power generation, CNC machine (our relief valve used in Fanuc cnc machine from 2017),shield machine,petroleum extraction etc.AHI aim:To be your long term partner!Most of mainly customer work with AHI over 10yrs in Europe & American,just like Lincoln,SKF,DTA...AHI passed the 16949 quality systemChoose AHI choose long-term partner!