FeaturesNon-metallic construction provides superior corrosion resistance for reliability in harsh environmentsUV stabilized, ideal for direct sunlight (avoids fiberbloom associated with fiberglass)Chemically-resistant to a broad range of chemicalsEasy to install, no tools requiredOil-resistant gasket providedPolyester material has a UL 94 rating of 5 VAThread and nut are constructed of non-glass filled polyesterInnovative 3 in 1 Self-centering design reduces inventory requirements, 4 models cover 12 common industry cut-outs ranging from 1/2 to 4 in16 gauge galvanized steel backplatePlated stud #10-32 x 5/8 in and wing nut Stainless Steel Models16 gauge stainless steel backplateSeal, backplate, stud (10-24 x 5/8) and wing nut are 300 series stainless steel