2" Conduit Piston For Use With Blower or Vacuum Power Fishing System to Pioneer The Line Through The Conduit Run. Flexible Foam Body For An Air-Tight Seal. Color-Coded End Disk With Embossed Size Markings For Fast, Easy Selection. Strong Steel Center Rod With Loops On Both Ends. Pistons Available For All Types and Sizes Of Conduit 1/2" Through 6". Standard Pack Of 6.