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This standard gives the requirements for four types of heat-shrinkable polyolefin sleevings suitable for use at temperatures up to 135 °C. Type A Flame retarded, shrink ratio 2:1 Type B Not flame retarded, shrink ratio 2:1 Type C Flame retarded, shrink ratio 3:1 Type D Not flame retarded shrink ratio 3:1 These sleevings are normally supplied with internal diameters up to 102 mm for shrink ratios of 2:1 and up to 39 mm for shrink ratios of 3:1 and in the following colours for types A and C: black, brown, red, yellow, green, blue, orange, violet, grey, white and green/yellow. Types B and D are transparent. Sizes or colours other than those specifically listed in this standard may be available as custom items. These items are considered to comply with this standard if they comply with the property requirements listed in Tables 3, 4, 5 and 6 except for dimensions and mass. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone.