This set contains one seamless one piece upper cowling for the Eduard Spitfire Mk XVI kit. This cowling is subtly bulged to clear the American-built Packard Merlin engines fitted the the XVI. The kit cowling is molded in two parts. Assembling them and sanding out the seam without destroying all that incredibly fine rivet and fastener detail is very fussy and time consuming work. We've done that for you. A simple, one piece, drop-fit replacement part that helps you get on to the fun part! 1\48 Scale Master Patterns by Roy Sutherland (designed to be used with Eduard kits)