THIS IS FOR (QTY 2) MDF 8 BZ BEZEL INCH SPEAKER RING INSIDE DIAMITER --- 7 1/4 INCHES OUTSIDE DIAMITER ---- 8 7/8 INCHES THICKNESS ---- 1 INCH CUT OUT DEPTH--- 9/16 CUT OUT WIDTH--- 8 1/4 BEZEL INSIDE DIAMETER--- 7 3/16 BEZEL OUTSIDE DIAMETER--- 8 5/16 BEZEL THICK--- 1/16 ALL RINGS ARE MACHINED FOR PERFECT ACCURACY PLEASE CONTACT US FOR CUSTOM CUT RINGS & SIZES WE HAVE MULTIPLE MDF RING SIZES & STYLES THESE ARE GREAT FOR BUILDING FIBERGLASS BOXES, CUSTOM SPACERS