Smooth inside for easier wire pulling; no hazardous sharp edges or burrs; will not damage conductors. Lightweight and lower installed cost. Integral rigid and flexible PVC construction. Use with nylon Heyco-Flex Connectors; Straight or Snap-in, or Sweep. Also use with NPT Quick Twist Fittings. Straight or Sweep. May also be used with Heyco’s Metallic Fittings for Liquid Tight Conduit: Straight-Thru or 90° Sweep. Resists corrosion, abrasion, oil, water, acid, metal shavings, and rough environments. Resists abuse, pull, and crushing. Approved for direct burial. Sunlight resistant. Suitable for indoor/outdoor use: HVAC Equipment, Machine Tools, Marine Equipment, Motors and Controls, Printing Equipment, Pumps, Refrigeration Equipment. Temperature ratings: 80°C (176°F) DRY 70°C (158°F) OIL Resistance 60°C (140°F) WET locations Passes submersion test of 70 psi. Voltage rating: 600V Mounting brackets are available. Order Part No. 8340, HF-28 Cutting Tool, for cutting Heyco-Flex conduit and tubing cleanly and evenly.