we are one of professional manufacturers of undercarriage parts locating in Quanzhou. Since 1991, we are a professional casting factory, supplied many castings to many other local undercarriage parts factories. and since 2005,we started our own undercarriage parts producing line ,and what our mission in this step is to produce better quality than other local suppliers and build up our good brand and reputation in this market. in net weight, I can take one for example. PC200 Track roller, it is 39kgs of our products,and as far as we know, most of others are lower than 36kgs. but our price also little lower than . Besides, we've also established long-term business with BERCO company cause of our quality and reputation. especially, we are cooperating with BERCO in some special specs of undercarriage parts.For other European countries, we also made some specs moulds in Sprockets (with the diameter 1.2 meters) and idlers (bigger than D375) .