1. Product Information a). Type: Crawler crane undercarriage parts b). Mainly include: Crawler crane track roller, top roller, idler, sprocket, track link, drive chain c). Technique: Casting, forging d). Material: 35SiMn, 28CrMnMo, 40Mn2, etc. e). Warranty: One Year/2000 hours f). Accept OEM OR Drawing 2. Suitable Machinery BRAND MODEL HITACHI KH70, KH100, KH100-1, KH100D, KH125, KH125-2, KH125-3, KH150, KH150-2, KH150-3, KH180, KH180-2, KH180-3, KH230, KH230-3, KH250HD, KH300, KH300-2,KH300-3, KH500-2, KH500-3, KH700, KH700-2, KH850, KH1000, U106A, TH55, CX300, CX350, CX500, CX550, CX650, CX700, CX900, CX1000, CX1100,CX1800, CX2000, PD7,PD60FL, PD100, etc. http://www.craneundercarriage.com