Riser height 7 7/16’’, A10 starter kit with connectors and top extra riser hook straps plus four 2 step extensions with connectors # of steps / risers 18/18 & 18/19, Floor to Floor stair heights 131" to 137" (18 risers) & 139" to 145" (19 risers), Horizontal Run 188", All connecting fasteners with Allen key, parts list and assembly picture instructions included. Package Sizes & Weight 5"x14"x 70" 64 lbs. + four (5’’x 7’’x 26’’ 15 lbs) American customers pay in US $. (no sales tax). All payments including with credit card mare made through Shopify/PayPal.