10 Riser Straight Stair Flight Regulations: UK Domestic (Standard) Made from Sustainable Timbers Floor Height (FFL) 2000mm Number or Risers: 10 at 200mm Treads supplied 99cm. Can be cut to size on site to suit overall string requirements. Whitewood 32mm Strings 21mm Whitewood Treads 9mm Plywood Risers 223mm Going Kit to include Wedges and Glue Blocks Kit form for assembly on-site Strings are pre-routed to suit Rise and Going