I'm not sure what kind of frame this is, I found the frame at a second hand resale store and it was rattle can silver. I'm sure it's a Wally World special (Wal-mart). The tank is two pieces of 1/8 th inch aluminum shaped to fit the inside the frame shape with three metal tabs welded to the frame and attached with chrome acorn nuts. I've been a little busy lately, we just had a little baby girl in February and our computer was down. I'm still waiting on the seat to finish this one.