This listing is for a set of left and right mower deck gauge arms for John Deere lawn mowers. These arms are new and have never been used. They are compatible with many John Deere lawn mowers. Compatible with John Deere X540 X590 X500 X520 X530 X534 X340 X360 X300 X304 X320 X324 Tractors. Upon purchasing, this order will be shipped the same day or the following business day.