Valor Fitness CA-53 Speed Bag Platform, 2-Inch Steel frame measuring: 2-Inch X 2-Inch, 2-Inch X 1-Inch 2-Inch High density wood platform 23-Inch in diameter Protective platform ring guard around entire platform 13-Inch height adjustment worm drive Assembly Instructions: Assembly Required (tools included) Comes with mounting bolts for both cement and wood mounts