The hole underneath is 1.5mm.
Detailed BR Oil Type Tail Lamps Model Railway Black 10 X OO Gauge
Detailed BR Oil Type Head Lamps Model Railway Black 10 X OO Gauge
Detailed BR Oil Type Tail Lamps (kit L1) - WITH CRYSTALS - OO Gauge (Pack of 6)
BR Oil Type Tail Lamps - OO Gauge (Pack of 6) - L4
BR Oil Type Tail Lamps - TT:120 Scale (Pack of 10) - L5
Detailed BR(Midland Region) Oil Type Headlamps - OO Gauge (Pack of 6) - L8
