57 mm

If you have a Gan III 57 and think it is a bit unstable but you like the feeling of the cube.. you should look into the new Core which you can order from different stores. It makes the cube so much better. http://youtu.be/WXZWNfTB7Vc?list=UUIXTiyCxjMTqLy2P_gV5Vxw