to 1-3/4 in.
L x 1/4 in. Chrome 96" Sliding Door Hardware H; Rail size: 96 in.5 in. thick wood door•To obtain the maximum weight capacity, all rail mounting fasteners must be mounted directly into solid wood•Do NOT install directly onto a drywall surface rail, 6 wall mounting brackets, 2 roller straps, 1 center guide, 2 rail stops and 2 anti-jump block (door not included)•Door straps size: 1-1/2 in.