This replacement resin blanking plate is degined to improve the Revell / Italeri 1/72 Sikorsky H-19 range of helicopter kits.
One of the problems with this kit is the rather odd "bump" on the bottom of the fuselage underneath the main cabin. This appears on only a few H-19's, this conversion piece is therefore applicable to many H-19's and all Westland built Whirlwinds.