When placing an order, following information to be given:
- Dimensions of window (clear light or ecternalor cut out),
- Type of window NW (for welding) or NB (for bolting),
- Materials: frame, glass retaining list,
- Depth of frame (HF),
- Glass thickness or design pressure,
- Glass type (single, laminated, etc.),
- Any other requirements (as many as possible).