Conform To The Popularity Manufacture's Roof Drain Advantage: Meet Customer's Small Batch And Personalized Requirments. Material: Cast Iron, EPDM Gasket Height: 2-1/8" To 3-1/2" Why Choose Us: 1. 25+ Years' Experience In Cast Iron Roof Drainage And Floor Drainage Production 2. One Automatic Casting Production Line Exclusive Produce Roof Drainage And Floor Drainage 3. Li Has QC Manager Approval And He Has Strict Requirements For Product Quality OEM: Acceptable