Home / Catalog / HDPE Backing Rings / Class 150 HDPE Backing Rings / Class 150 - To Fit HDPE DIPS Flange Adapters Class 150 - To Fit HDPE DIPS Flange Adapters Class 150 Carbon Steel to Fit HDPE DIPS Flange Adapters (12) Class 150 T-316L Stainless Steel to Fit HDPE DIPS Flange Adapters (12) Request Information