This is a resin and white metal ship model kit.
Detailed resin set with photo-etched parts.
From the manufacturer's website:
This highly detailed set covers the front crew quarters section. Set contains 3 bunks, personal lockers, watertight bulkhead with sealed doors, watertight bulkhead with manhole hatch and floor. This set is intended for the new Revell 1/72 scale U-boot Typ IXC.