High quality MDF speaker spacer rings. Our rings are CNC Manufactured in the USA from high grade MDF material. These are not low quality foreign imports. Several sizes available: 6-1/2" Speaker size Outside diameter 7-1/4" Hole cutout of 5-11/16" 3/4" Thick 8" Speaker size Outside diameter 8-3/4" Hole cutout of 7-1/8" 3/4" Thick 10" Speaker size Outside diameter 11" Hole cutout of 9-1/4" 3/4" Thick 12" Speaker size Outside diameter 13" Hole cutout of 11" 3/4" Thick 15" Speaker size Outside diameter 16-1/4" Hole cutout of 13-3/4" 3/4" Thick Notes Can be used to extend speaker mounting depth on a box by 3/4" Can be used for fiberglass projects Rings are sold in pairs Looking for a different size? Contact us we can meet your needs.