7" Ditch Witch JT520 180x72x39 Mini Excavator Rubber Track Bobcat MT50 MT52 MT55 - OEM quality materials and manufacturing - Anti Vibration System - Steel Core Lugs - Continuously wound steel brace prevents snapping - 100% Virgin Rubber - Fits Bobcat: MT50, MT52, MT55, 418, E08, E10 - Fits Ditch Witch: JT520, SK500 - Fits Kubota: KX21 - Fits Takeuchi: TB080 - Width: 180 MM - Pitch: 72 MM - Links: 39 - Weight: 62 LBS