John Deere AM130907, MTD 490-900-0041, Cub Cadet 490-900-0041 - Measure one side cutting edge. Check height on gauge., USE GLOVES TO AVOID INJURY, Mower blade cutting height gauge range is 1 1/2" to 5", - Deck is level if heights are the same. If not, deck adjustments will need to be made., Plastic, - Measure other side cutting edge. Check height on gauge., Measure tip to tip cutting edge (side to side and front to back), Used to accurately level and measure mower decks on all riding and walk behind mowers