1 FUNKS Nabra SL Stainless Steel Gaff Common Parts Extension Shaft Tuna Harpoon This is an extension shaft that can be used with FUNKS' large harpoon Nabra SL and FUNKS' stainless steel gaff. The main body length, excluding the threaded portion, is approximately 40cm, and multiple shafts can be connected. There is some minor rust, but the actual frequency of use is low, and it appears to be in good condition.