Is your zero-turn mower's deck belt looking worn or starting to slip? This replacement V-Belt is the exact size you need: 5/8 inch wide by a full 176 inches long (that's the B173 model). It's a direct swap for OEM part numbers like Snapper 5103871YP and Ferris 1522061, 22061, 5022061, 5103391, 5103671, and 5103871. It fits a bunch of popular mowers with 61-inch decks, including Snapper models like the ZT2561, ZT2561F, ZT2761F, and the 550 series zero-turns. It also works on Ferris zero-turns like the IS2000Z, IS3000Z, IS3100Z, and their walk-behind models with that 61-inch deck. Even some Scag and Simplicity mowers use this same belt. Basically, if you've got a 61-inch cutting deck on one of these brands, chances are this is the belt for you. It comes as a single belt, ready to install. Just make sure to check your model number against the list to be sure, then get your mower back to making clean, smooth cuts.