AM136327 Right Hand Front or Left Hand Rear Mower Deck Gage Wheel Arm for John Deere X300 X500 Lawn Tractors 48In & 54In Mower Decks ApplicationFit for John Deere X300 X500 Series 48in & 54in Mower Decks( Please kindly refer to picture 3 to know detailed model) FunctionUsed to make the adjustments for the Mower Deck Gage Wheel.The part number is AM136327 and is for the Right Hand Front or Left Hand Rear MaterialConsturcted from heavy- duty steel with high strength, it is surtdy enough to resist impact and meet your need, durable to use for a long time. ReplacementDirectly replace OEM AM136327, Manufatured from OEM Specification. Satisfaction GuaranteeIf you are not satisfied with this item, simply return it for a full refund within 30 days. Please feel free to contact us if you have any questions. Product Description Fits On Models: X300 Series: . X300 with 48c mower decks . X320 with 48in rotatable mower decks beginning with serial number 040001- . X320 with 54in mower decks . X324 with 48in rotatable mower decks beginning with serial number 040001- . X340 with 54in mower decks beginning with serial number 045000- . X360 with 48in mower decks X500 Series: . X500 with 48in rotatable mower decks beginning with serial number 020001- . X500 with 54in mower decks beginning with serail number 020001- . X520 with 48in rotatable mower decks beginning with serial number 020001- . X520 with 54in mower decks beginning with serial number 020001- . X530 with 54in mower decks . X534 with 48in rotatable mower decks beginning with serial number 020001- . X534 with 54in mower decks beginning with serial number 020001- . X540 with 48in rotatable mower decks beginning with serial number 020001- . X540 with 54in mower decks beginning with serial number 020001-.