this one is made of steel FITS SOME J SERIES ENGINES 104-1476 FLYWHEEL ONAN BLOWER WHEEL WITH 104-0423 RING GEAR WICO MAGNET ROTOR RING GEAR IS 104b423 104-0423, BEEN IN STORAGE FOR 35 PLUS YEARS. HAS SOME LIGHT SURFACE RUST BUT IT IS NO BIG DEAL. FABULOUS VINTAGE FLYWHEEL FIND. casting number on wheel is 2526 New Old Stock, never used. Winner pays CALCULATED shipping and handling anywhere in USA. Other countries must contact me for a postage quote. Please look at my STORE AND other auctions and put me on YOUR FAVORITES. You may also want to visit ask me for help to see 1000's of new obsolete, discontinued and hard tofind Onan items. NOS means new old stock. This item has been in surplus storage for years. The box may be tattered or the item may be a bit dusty but fully functional. If you are not satisfied with the condition of your item please contact me immediately. All items are new and unused. I will answer all emails to the best of my ability. Please send part numbers when inquiring about certain parts. An educated buyer is my best customer. Thank you. ... Mike ... The free listing tool. List your items fast and easy and manage your active items.