3M(TM) Cold Shrink End Cap EC-4, 10 per case Environmentally seals and mechanically protects exposed cable ends using no tools, mastics or tapes. Cable range 1.79" - 3.32" (45,5 mm - 84,3 mm) The 3M(TM) Cold Shrink EC-Series End Caps protects cables, pipes and other cylindrical objects from exposure to moisture, contamination, corrosion, ozone, ultra-violet radiation, physical contact and other environmental hazards.