Part name: Gear room cover OE NO.: F3100-1002201C Material: HT250 Hardness: 187-255 HB Melting point : 1145-1250 Tensile strength: 185-255 Mpa Dynamic balance amount: 20g cm Finish: friction surface is 1.6, others are 3.2 Metallographic structure: flake graphite+pearlite Processing: casting and machining Our advantages:1.Professional manufacture for more than 6 years , past the ISO/TS16949 test. 2.Material is steel. 3.Produce goods according to Yuchai standard requirements to control the quality. 4.Every processing by high technology equipments such as CNC machining, do the super finish , dynamic balance test etc. 5.Adequate supply capacity with over 250pcs per day, punctual delivery time as the contracts. 6.OEM, ODM are welcomed 7.3 months warranty after sales.