THIS IS FOR (QTY 2) MDF 6X9 INCH SPEAKER RINGS THESE COME WITH BLACK CARPET LENGTH MEASUREMENTS INSIDE DIAMETER --- 8 7/8 INCHES OUTSIDE DIAMETER --- 10 7/16 INCHES WIDTH MEASUREMENTS INSIDE DIAMETER --- 6 1/8 INCHES OUTSIDE DIAMETER --- 7 3/4 INCHES THICKNESS ---- 3/4 INCH 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