Bobrick Matrix Series, Multi-Roll Toilet Tissue Dispenser, Surface Mounted. ABS Plastic, grey color. Holds two rolls up to 5-3/4 in. dia. Extra roll automatically drops in place when bottom roll is depleted. Unit 6-1/4 in. W, 13-1/2 in. H, 6-7/8 in. D. Av. Mtg. Ht.: 28 in. - 36 in. to top of unit; Barrier-Free 28 in.