OPEN SEALS: Used with a Feedwheel tensioner. 
#301  3/8" STEEL STRAP OPEN SEALS
#401  1/2" STEEL STRAP OPEN SEALS
#501  5/8" STEEL STRAP OPEN SEALS
#601  3/4" STEEL STRAP OPEN SEALS
 
CLOSED SEALS- Used to give extra strength. with a push-type tensioner.
#303  3/8" CLOSED / OVERLAP STEEL STRAP SEALS
#403  1/2" CLOSED / OVERLAP STEEL STRAP SEALS
#503  5/8" CLOSED / OVERLAP STEEL STRAP SEALS
#603  3/4" CLOSED / OVERLAP STEEL STRAP SEALS
#703  3/4" HD CLOSED / OVERLAP STEEL STRAP SEALS
#803  1-1/4" CLOSED / OVERLAP STEEL STRAP SEALS
#818  1-1/4" HD SNAP ON STEEL STRAP SEALS- SEMI OPEN
 
Sold per case of 1000 seals (by weight)