This listing is for one 26024 pinion gear with shaft, compatible with Gribaldi Salvia Super Rotor Series disc mowers. Please reference position 16 in the exploded view of the mower. One 26024 Pinion Gear is used on each blade rotor. We also have other parts for this disc mower available in our eBay store. The Super Rotor Series Disc Mowers is the older version of the Gribaldi Disc Mowers and mast had 3-blade disc pans. Part Number: 26024 We sell many replacement parts for the most manufacturers of tillers, finish mowers, spreaders, 3-point hitch hay tedders and sickle bar mowers. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check our store often.