Torpedo Vents - pack of 10

These are a range of torpedo vents as used on many railway lines. They are of generic design and are sized by the distance over the cones and the central diameter. They are in 0.5mm increments over the cones. 4 x 2 has been used on 4mm coaches and 3 x 1.5 on 3mm coaches. Choose the size that looks right for your model and era