Wiper          x1
 Guide Bush     x1
 Rod Seal(25)   x1
 Copper Key     x4
 Slide key        x1
 Every 2years/200hours of use lower tube service
 While the lower tube is removed, any moving parts of the cartridge shall be inspected for wear, especially the  shaft and inner tube for any sings of wear
 such as scores, scratches and/or a fading color of the coating.