Seller: junkyard4$ (3,428) 100%, Location: Libertyville, Illinois, Ships to: Worldwide, Item: 360183793446 This is the gear that goes bad on Bell and Howell cube type slide projectors. If you have one of these projectors you can pretty much expect the gear in your machine to go bad. The original gears were made out of an inferior material that was too soft. New old stock gears would be made of the same material and although they have never been used they most likely will fail right away since they are made of the same inferior materal. They were made soft to reduce the mechanical noise when the gear runs. This was told to me by the person who designed them at Bell & Howell. These new replacement gears are made out of Delrin, an excellent material for gears. Delrin is sometimes used to make gears that are normally made of metal. Don’t miss your opportunity to finally fix that old projector or get a spare gear for your working machine while they are available. Detailed installation instructions will be included with every gear. It makes no difference what color the gear is in your machine. These gears just happened to be made out of white plastic as opposed to the original color of black. Please contact me if you have questions. See my other auctions.