Black Widow Tree Climbing Rope 12.2 mm – EN 1891 A Black Widow Tree Climbing Rope 12.2 mm – EN 1891 A Atrax Tree Climbing Rope. 11.6 mm Ø – EN 1891 A Atrax Tree Climbing Rope. 11.6 mm Ø – EN 1891 A Lignum Static Tree Climbing Rope Lignum Static Tree Climbing Rope