4"Cast IronFloor Lock Corrosion resistant finishes Foot Operated Reinforced rubber pad on base BronzeFinish - Mounting height is 5 5/8" Silver Finish - Mounting height is 5 13/32" Choice of Bronze or Silver Finish. See mounting heights above for each. If no finish is selected, the Bronze will be shipped. Please select or email your Finish choice. Leveling, stabilizing and elevating portable equipment. Retracting Height is 4 11/16" Top Plate Size 3 11/16" x 5 3/8" Bolt Hole Spacing 2 5/8" x 3 5/8" Bolt Diameter is 3/8" Reference 80/20 part 2727.