These are a Injection molded 10” wheel side mount adapter with a 11.2” OD, 9” ID 5*, and a ½” mounting surface tilt to follow the flow more of the outside of the saddle bag, to allow a deeper speaker to be mounted with enough room for proper ventilation. Max mounting depth will vary by bag manufacture. Fitment will also vary by bag manufacture. Using a Quality bag or stock bag will achieve the best results. The inside diameter may have to be opened slightly as there are different speaker manufactures on the market. This Kit you will receive (1) tube of 220ml 90min NG90 panel bond, and mounting hardware. Applicator sold separately. If you choose the inserts those can be Purchase separately. Kit will include 90min panel bond 32 strews 16 to hold the speaker to the bag and 16 to hold the speaker to the Adapter. 1/8″ drill Bit 2 Braces Instructions Sold in Pairs Speakers NOT included