size: 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4" ITEM NO. TQ-20~TQ29 material: Zinc Die Casting, Aluminum INDOORS/OUTDOORS Steel with zinc plating. Indoor or outdoor applications. Use to secure Rigid conduit I.M.C. conduit or various threaded fittings to a steel outlet box or other metal enclosure. For more products catalog please contact our company.