(1) HAS APERTURES OF ITS MESH NOT MORE THAN 190MM, MEASURED BETWEEN OPPOSITE KNOTS WHEN THE MESH IS HUNG OR CUT TO MAKE IT SQUARE MESH. (2)IS MADE OF FRAMING ROPE AND NETTING, WITH AT LEAST 400KGWT AND 125KGWT BREAKING STRAIN, RESISTANT TO ACTINIC DEGRADATION