Riser height 7 ¾ ’’, B10 starter kit with connectors and top extra riser hook straps plus one 2 step extension with connectors # of steps / risers 12/12 & 12/13, Floor to Floor stair heights 91" to 96" (12 risers) & 98" to 103" (13 risers), Horizontal Run 126", All connecting fasteners with Allen key, parts list and assembly picture instructions included. Package Sizes & Weight 5"x14"x 72", 65 lbs.+ one (5’’x 7’’x 25’’ 15 lbs) American customers pay in US $. (no sales tax). All payments including with credit card mare made through Shopify/PayPal.