IMR5-67 Worldwide .5 in Capacity 6 Ring Memo Metals - 100 pcs Total // 7 in Overall Length w/ One Open Only Booster // 6 in Rivet Spacing // Ring Spacing = 3/4" x 3/4" x   2"  x 3/4" x 3/4" //  Open Carton = 100 Pcs Total