heavy model highly abrasion-proof (abrasion resistance about 2.5 to 5 times better than most rubber materials and about 3 to 4 times better than most soft PVC´s) smooth interior optimized flow properties flexible with low weight high tensile strength and tear resistant good resistance to oil, gasoline and chemicals good resistance to UV and ozone small bending radiuses kink-proof free of softener and halogen gas and liquid tight conform to RoHS guideline according to German TRBS 2153 (formerly BGR 132): capable of electro-static discharge by grounding the spiral, recommended for many applications with the exception of inflammable bulk materials