trade size: 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4" ITEM No. SP-10~SP-29 ONE HOLE, TWO HOLES material: plated steel Indoor or outdoor applications. Use to secure Rigid or I.M.C. conduit to wood, masonry or similiar surfaces. for EMT/Rigid Pipe For more products catalog please contact our company.