Ring compositeNCK_4555NCK_4553NCK_4552NCK_4551NCK_4549NCK_4548NCK_4547NCK_4546NCK_4541NCK_4540NCK_4539NCK_4537NCK_4536NCK_4533NCK_4533-2NCK_4532NCK_4529NCK_4528NCK_4526