Sections to make up 25cm radius curve, but compatible with trainset track such as Peco OO/HO and Hornby OO. Require to cut and fit code 100 rail. Smaller stone pattern similar to Wills OO stone setts. Radius is 25cm. Angle of 1 section is 30deg. Distance between parallel tracks is very close to that between trainset R2 radius tracks.(67mm)longer version of 250mm radius curve with smaller stones. angle is 30 degrees.