Excuse me. In reference to pictures A and B above “Gas Bike Frame”: May I respectfully say that I am sure Alibaba is a very good place to do business. I own two gas tanks and one frame brazed from scratch from Sportsman Flyer. They may cost three to ten times more than anything else I have. The quality is literally ten to twenty times better. The gas tanks are a work of art and the frame is as close to perfect as anything on earth. The ride on his merchandise is steady, smooth powerful, well balanced and excellent maneuverability. There is no comparison between the Sportsman Flyer merchandise that I own with the other very good bikes I own.