THIS IS FOR (QTY 2) MDF 15 INCH SPEAKER RINGS

INSIDE DIAMITER --- 13 3/4 INCHES

OUTSIDE DIAMITER ---- 16 3/16 INCHES

THICKNESS ---- 3/4 INCH

ALL RINGS ARE MACHINED FOR PERFECT ACCURACY 

WE HAVE MULTIPLE MDF RING SIZES & STYLES

THESE ARE GREAT FOR BUILDING FIBERGLASS BOXES, CUSTOM SPACERS