This set of mower belts is a genuine John Deere product designed for use with various models including X330, X350, X354, X370, X380, X384, X390, X394, X570, X580, X584, and X590 with 48A Deep Accel mower decks. The primary belt is labeled M169485, while the secondary belt is identified as M169500. This belt set is compatible with John Deere brand mowers and is made of durable Kevlar material.