NS 7, Standard, 1120 - 1740 mm, class B, NS 10, Standard, 1120 - 1740 mm, class B, NS 15, Standard, 1130 - 1755 mm, class B, NS 20, Standard, 1130 - 1755 mm, class B, NS 25, Standard, 1155 - 1775 mm, class B, NS 30, Standard, 1155 - 1775 mm, class B, NS 35, Standard, 1005 - 1625 mm, class B, NS 7, Standard, 1120 - 1740 mm, class D, NS 10, Standard, 1120 - 1740 mm, class D, NS 15, Standard, 1130 - 1755 mm, class D, NS 20, Standard, 1130 - 1755 mm, class D, NS 25, Standard, 1155 - 1775 mm, class D, NS 30, Standard, 1155 - 1775 mm, class D, NS 35, Standard, 1005 - 1625 mm, class D