PILOT Myu μ701 Fountain Pen Disassembly Jig This is a disassembly jig for those who want to remove the nib from the stainless steel nib of the Pilot Myu 701 and perform maintenance themselves. It is made from pipe forming material, but it has sufficient strength and durability. You don't use it very often, and there's no need to buy an expensive one of the same type. You can use it to correct and adjust the nib by removing it, and to perform maintenance such as removing ink residue. If ink is solidified inside the neck, wash it thoroughly before disassembling.