3.70 × 4 Meter Porta Cabin — strong and durable sandwich panel construction, suitable for a room, office, site cabin, security room, or accommodation. Available with door, windows, electrical work and customized interior options. Quality construction with 1-year guarantee. Porta Cabin Caravan measuring 3.70 × 4 meters — made of strong and durable sandwich panels, suitable as a room, office, security room, accommodation, or site caravan. Available with doors, windows, electrical work, and custom interior fittings. High quality with a one-year warranty.