Aftermarket adjustable gauge wheel arm replacing John Deere AM120680. This gauge wheel arm is commonly used on the right front position on 54C and 62C mowers. IT IS CRITICAL TO KNOW YOUR PART NUMBER TO ENSURE PROPER FIT. These gauge wheel arms look similar but they are not all the same. There are different shaft sizes depending on serial number breaks and product design changes as well as machined differently for the different positions. This is a identical replacement for John Deere part number AM120680 only. Please utilize your own resources to identify if AM120680 is correct for your application or contact us with your model and serial number for assistance. AM120680  has a .900 inch vertical shaft.