This comprehensive piping block library contains almost 14,000 2D piping symbols in several different symbol categories. This is not just a set of blocks, but a fully functional easy to use program that loads in AutoCAD's menu bar. Just choose what you need from the pull-down menu. Piping Symbols Library version 1.2 For AutoCAD and AutoCAD LT 2000 and newer More information | Download demo | Buy Now