We have Parker 45 Steel nibs complete with feed and collar Extra Fine or Medium grades. We now have no other grades available
Fitting is easy - you simply unscrew the old nib/feed/collar from the nib shell and replace it with the new nib/feed/collar. If the old nib doesn't want to unscrew, it's probably glued in place by old dried ink. If so, you just need to soak the old nib unit in some cold water for a few hours to loosen up the ink
These nibs are all unused ex-factory stock