72" Long, Plastic Replacement Track for older patio door bottom threshold tracks, SEE DETAILS BELOW - Sliding Door Track Patio Doors - Track is 72" in Length to fit many sliding patio doors ( see pictures for style )  - Replacement Track | Door Bottom Threshold Tracks | Sliding Door Track Patio Doors -  This part does not include the stainless steel track cap / cover ( it is sold separately ) White vinyl replacement tracking for many older style double panel glass sliding doors 72" Length.