... Raw material: 45#, 50#, B7.45# 3) Surface: plain (oil)2. Gauge apron 1) Used in 115RE, 132RE, 100RE, 133RE ... 45#, 40Mn2, 20Mnsi, 35CrMo, 40Cr, 42CrMo 5) Surface: plain (oil), black paint, color paint, zinc, hdg; ect5. Spring Washer/Lock washer/one coil /two ... SKL14 2) Raw Material: 38Si7, 60Si2CrA 3) Surface: plain (oil); black paint; color paint; zinc; hdg; etc8. Screw spike/sleeper screw/ dog spikes ...