JXPARTS Yanmar L100 Diesel Engine Piston Ring Chinese 186 186F Diesel Engine Piston Ring for Yanmar L100 and Chinese 186F Diesel Engine Brand New Pison Ring Fit for Yanmar L100 86mm Bore Diesel Engine Generator Motor Fit for Chinese 186F 86mm Bore Diesel Engine Generator Motor Ships from China, takes 7 to 15 days After shipment is made, Amazon may send an email saying it take 3 to 4 weeks to arrive you. Please disregard this time frame, it is a default time frame by Amazon for shipment from China. The actual delivery is 7 to 15 days, if you do not receive it within 15 days, please contact us for customer service.