You are buying 14 bag tubes. Bag tubes are designed to separate your clubs in your golf bag. These tubes make it very easy for you to take clubs in and out of your bag without the shafts getting tangled and the grips getting stuck. The tubes are 85 cm long which means they will fit any golf bag. The diameter is wide enough to accept even the biggest of jumbo grips.
The internal diameter is 29mm and the external is 31mm.