Check the listing for details. Angle Flange (Angle Ring) - Industrial Grade - 24" dia.. Condition: New. Listed at 99.99 USD. (1) 24" mild steel angle rings included in this package and shipping is included. Connecting Flanges for Ductwork Systems Industrial grade angle flange (angle ring) Used for connecting sheet metal parts together Unpainted Other finishes available from mfg: Galvanized, aluminum, stainless Listing is for (1) un-painted mild steel angle ring Item Weight 13 pounds Origin Made in USA Color un-painted mild steel Finish Unfinished Material iron Pattern Unpainted Shape Circular Thickness 0.188 inches Item Package Quantity 1 Number Of Pieces 1 Special Features Paintable Usage Connecting Sheet Metal Parts Assembled Diameter24 inchesBolt Hole Centers = 25 7/8"Number of Bolt Holes = 12Size of Bolt Holes = 7/16"Inside Diameter = 24 1/8" Technical Details Paintable Product Description Bluefin pressed and rolled steel angle rings are used widely in joining ductwork together in dust and fume control work. All rings are of mild steel, unpainted. All sizes are in stock for immediate shipment. 3" through 5" diameter angle rings are press formed, and above 5"diameter are roll formed and welded. They are available with or without holes. Holes are standard. Nuts and bolts not included. Larger angles, channels, bars and other sizes rolled to order in steel, aluminum, stainless and other alloys. Square and rectangular flanges are also available. All angle rings and flanges are punched on automatic equipment.