Railway gap ruler for rail gap measurement Railway gap ruler for rail gap measurement Rail Feeler Gauge 0.02mm, 0.03mm, 0.05mm, ,0.25mm, 0.30mm, 0.35mm ,0.40mm,0.45mm, 0.50mm, 0.55mm ,0.6mm ,0.7mm , 0.75mm, 0.8mm,0.85mm ,0.9mm, 0.95 mm,1.00mm. Steel ruler -2~17.5cm Gap ruler 5-30mm
