We carry a full line of replacement undercarriage parts for the Bobcat® 442 Mini Excavators. We stock all of your undercarriage and rubber track needs including sprockets (5671663006), outside guide bottom rollers (5671663001), inside guide bottom rollers (5671663002), top carrier rollers (5527640004), and idlers (5671663015). The Bobcat® 442 has a unique design enhancement which includes two types of bottom rollers so please see the bottom roller options for more details or call for more information. Some rollers roll inside the rubber track guide and some run outside the rubber track guiding system. Some parts are interchangeable with other Bobcat® models. They are backed by the equivalent OEM manufacturer warranty. The parts listed are typically in stock and usually ship the same day. Bobcat® frequently changes part numbers so if you have a problem locating the part you need please give us a call. There are several serial number breaks for this model so please verify before ordering.