This fence fitting is for reducing work injury with a post driver that easily drives steel posts into solid ground. Popular sizes : OD 60MM(pipe out diameter) X 3.2MM(thickness) X 600MM(height) X 7.2KGS(weight) OD 75MM(pipe out diameter) X 3.2MM(thickness) X 600MM(height) X 7.2KGS(weight) OD 75MM(pipe out diameter) X 3.2MM(thickness) X 800MM(height) X 9KGS(weight)