... E are made of UL approved nylon PA66,parts B and D are made of nitrile butadiene rubber(NBR)2. ... to 100 centigrade.4.Characteristics: Special design of clamping die and rubber part,large range in clamping cable, ultra-strong stretching resistance ... , waterproof, dustproof,and high ability to resist salt,acid,alkali, alcohol,grease and ...