Front Idler Roller With Rubber Trucks for Yanmar B7 Heavy Equipment Excavator. If you are in doubt, please send us message. Please make sure it will fit your machine before purchasing it. If you are not 100%. Sure this is what you need, please find out your engine model, series number and contact. Please check pictures for more details. Communication is the best way to solve the problem. If you have any problems after you. UPS Surepost usually takes 1-6 workdays. Please make sure it is correct. We believe our items are so outstanding. All products are quality checked. Otherwise deal is final. We will be happy to resolve any issues you may have in a cordial and friendly manner.