Hey, if your eXmark or Toro zero-turn mower's deck is making noise or the belt keeps slipping, a worn-out idler pulley might be the culprit. This NIDAIFEI 2-pack is a perfect, affordable fix. These pulleys are direct replacements for common OEM numbers like eXmark 1-633109, 116-4667, 126-7685, and Toro 132-9424. They fit a huge list of models including Toro Z Master Z500, Z580, Z589 and many eXmark Lazer Z models (E-Series, AS, etc.) and Front Runner decks. Specs are: 6.7-inch outer diameter, 0.66-inch inner diameter, and 1.12 inches tall. The best part? They have double-sealed, pre-greased bearings for smooth operation and long life, even in tough mowing conditions. They even throw in a handy L-shaped 14mm socket wrench to make installation a breeze. Keep your mower running smoothly and avoid downtime during the season. Always double-check your mower's model number against the super detailed fitment list before you buy to be sure. A great value 2-pack for essential maintenance.