Click to expand Tap to zoom Peco ST-21 Setrack Level Crossing Extension - N Gauge by Peco Sold out £6.95 | / SKU ST-21 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out Brand: Peco Part Number: ST-21 Scale / Type: N Scale Our Code: ST-21 Level crossing straight track addon unit.