cast shoulder
Material: pearl tic malleable iron, spheroidal graphite，low carbon steel
Type: single stem iron shoulders, twin stem iron shoulders
Approximate shipping weight: 1.7 lbs.
Normally packed 50 per bag
Rail size: 115-140RE
Insert/iron shoulders are casted in the concrete ties for fixation of elastic clips
Used in pre-stressed concrete ties or Bi-Block or Twin Block concrete ties 
