Do these come in 8’ lengths?

Hello, and thank you for your interest in Trex railing. The Enhance rail kit is only manufactured in a 6' rail length so this would not an option for the in stock Enhance rail kits offered at most Lowes store locations. However there is a special order railing line called Select railing which is identical in design to Enhance other than its manufactured rail length. The Select railing line is manufactured in 6' rail kits (67.5") and 8' rail kits (91.5"). As long as the 8' rail kit length previously listed works for your span then this would be a suitable option. I hope this helps. Thanks, Tori - Trex Customer Care Team