Hook for anal and vaginal use with ball 40 mm. The hook itself is from ring to ball: 34 cm longThe wire thickness of the metal: 0.8 cmThe ball is round and is fixed. The ring is flat and has an outer diameter of 3.5 cm and an inner diameter of 2.4 cm.This same hook is also available with a smaller ball of 30 mm. diameter, this item has order number #7816