One-piece construction of rigid, non-metallic reinforcement embedded in flexible PVC wall for exceptional crush and corrosion resistance. Durable, sunlight resistant and flame retardant thermoplastic PVC that resists heat, oil and chemical breakdown. Convenient markings in feet for easy measurement. Applications NMLT is designed for liquid tight applications which are subject to vibration, movement, oil, and corrosives. Suitable for indoor and outdoor use such as indoor lighting, water treatment systems, and HVAC equipment. Ratings UL listed for direct burial applications UL listed per UL Standard for safety 1660; UL File Number E211327 Conforms to the provisions of Article 351 of the NEC Sunlight resistant UL compound PVC Jacket Temperature range: 80°C dry and 60°C, wet to -34°C +70°C. Can be used for lengths of over 6 feet per 1993 NEC Oil resistant Specifications Trade Size: 1 Inch Internal Diameter: Min: 1.041 in. Max: 1.066 in. Outside Diameter: Min: 1.290 in. Max: 1.315 in. Jacket Color: Gray Jacket Material: PVC (Polyvinyl Chloride)