Cressi Resistant Aluminum Pole Spear 3 Pieces with Paralyzer Tip Adaptor for pole spear made in corrosion resistant tempered stainless steel. Made for join different threads: the female connection thread has a diameter of 11mm, the male connection thread has a diameter of 6 mm. Strength, durability, low maintenance and long life. Adds versatility to your spearfishing equipment. Cressi is a real diving, snorkeling and spearfishing Italian brand, since 1946.