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| OF | OA | OS |
| Open box for Flap | Open box for Aileron | Open box Small |
| on two sides opened box for flap fitting for 3mm steel-wire (4mm for large planes) | on two sides opened box for aileron fitting for 3mm steel-wire (4mm for large planes) | on two sides opened box for thin rudder fitting for 2mm or 2,5mm steel-wire |
| Price: 5,90 Euro (4,96 Euro without VAT) | Price: 5,90 Euro (4,96 Euro without VAT) | Price: 5,20 Euro (4,37 Euro without VAT) |
