These Future internal bushes are extremely popular.They are available in 8 sizes & finished in a range of colours.The sizes of the bushes are shown below.The dia. shown is the dia that will fit the pole to enable you to cut it back the correct amount. #1 - elastic rating 1/2 - dia. 1.1mm#2 - elastic rating 2/3 - dia. 1.3 millimetres #3 - elastic rating 3/4 - dia. 1.5 millimetres #4 - elastic rating 4/5 - dia. 2.0 millimetres #5 - elastic rating 5/6 - dia. 2.2 millimetres #6 - elastic rating 6/8 - dia. 2.4 millimetres #7 - elastic rating 8/10 - dia. 2.6 millimetres #8 - elastic rating 10/12 - dia. 2.9mm ....(continued here)