The VERTPAC-TSDR50G utilizes our vertical, 4-sided GVDR-13 to efficiently store 13 pairs of our best TSD-R rubber dumbbells - 3, 5, 8, 10, 12 & 15-50 lbs (5 lb jumps) A favorite of municipalities and smaller corporate fitness centers because of its smaller footprint and the ability to store larger dumbbells.