Comparison : Item # Z875-06PG, Z875 Series Z-Strut™ Channels (1-5/8" x 7/8")
Item # Z875-12PG, Z875 Series Z-Strut™ Channels (1-5/8" x 7/8")
Item # Z875-18PG, Z875 Series Z-Strut™ Channels (1-5/8" x 7/8")
Item # Z875-24PG, Z875 Series Z-Strut™ Channels (1-5/8" x 7/8")
Item # Z875-30PG, Z875 Series Z-Strut™ Channels (1-5/8" x 7/8")