4mm scale oo gauge. they are laser cut with a scored line to aid folding.
hornby mk2 bellows corridor connectors x 5 oo em p4 finescale
bachmann mk1 bellows corridor connectors x 5 oo em p4 finescale
12 x 00 Gauge 4mm Bachmann / Hornby MK2 Mark2 Corridor Connector Bellows BR BLUE
