Stauff CRA 320 ACT DP AS U W5 K 642012 Beta Clamp Kit, 20 mm Tube OD, Smooth Bore, 316 Stainless Steel, Polypropylene Cushion, Rail Mount SP10870LL 01 perm in Dry Cup Density 01 perm in Dry Cup Density 3 to 6 lb cu ft Sealing Method Contact Adhesive Plenum Rating Plenum Rated Water Vapor Absorption 0% Smoke Developed Index 50 Sound Transmission Class 13 Green Environmental Properties Fibers Non UL Required Conduit Material Steel Material Steel Flexible Conduit Color Gray Flexible Conduit Core Material Hot Dipped Galvanized Steel Jacket Material Plastic Special Features Very Flexible Finish Galvanized Flammability Rating ANSI Usable Temperature Range 22 Degrees F to 165 Degrees F Approval Rating ANSI Clamp Type Rail Mount Assembly NACE SP 0108 2008 System of Measurement Metric Type Anti Corrosion Rail Mount Standard Clamp Country of Origin Germany