Parker 45 GP Nib. (Medium) N546 £18.00 Quantity: at £18.00 each Add To Basket Summary; Manufacturer: Parker. Designation: 45. Origin: UK. Material: Gold Plated. Dates from (approx): 1970. Overall Length: 44mm including collar and feed. Writing Width: Medium. Notes: All sizes and measurements are approximate. Any replacement nib may need some adjustment when fitted to the pen. We can fit this nib as part of a service on your pen, email us for details. Postage in the UK is free on this item!