Home / Catalog / Fiberglass Pipe Flange Reinforcements & Rings / Fiberglass Pipe Backing Rings / Page 2 Fiberglass Pipe Backing Rings Showing 21–22 of 22 results Compare 16.50 Inch (in) Inside Diameter (I.D.) T-316L Stainless Steel Backing Ring Reinforce Molded Fiberglass Flange Read more Compare 16.50 Inch (in) Inside Diameter (I.D.) Carbon Steel Backing Ring Reinforce Molded Fiberglass Flange Read more ← 1 2 Request Information