Slaters S7951L - 7mm Scale 0 - 12 x 3.2mm Steel Handrail Knobs. SLATER'S PLASTIKARD LIMITED S79 51L - 7mm SCALE - 0 GAUGE - STEEL HANDRAIL KNOBS - SMALL - 12 x 3.2mm - THIS IS THE LENGTH FROM THE BOILER SIDE FLANGE TO THE START OF THE HANDRAIL HOLE BRASS 0 GAUGE.
