The Barmkin Hard-top Conversion Kit is a multi-piece set that includes a custom hull.  This kit is compatible with the Games Workshop Chimera plastic model.

The hull measures 2.9 inches (74mm) long, 2.0 inches (49mm) wide, and 1.5 inches (38mm) tall.  The rear hatch comes with two 1/8 inch diameter by 1/16 inch thick magnet allowing allow it to open and close easily on the battlefield