This product is an improved version of the rear speaker baffle we are selling, designed to allow the installation of speakers with a 140mm inner diameter. Please be sure to check the drawings to confirm that your speakers are compatible before purchasing. The following description is quoted from other baffle listings: Specifically designed for Suzuki Jimny (JB64) and Sierra (JB74) models. This is a necessary baffle for installing rear speakers. Designed and manufactured using a 3D printer, and confirmed to fit. Made of PLA (plastic) material, it is resistant to moisture and less prone to degradation. Installation has been confirmed with TS-F1640 speakers. Other speakers are also likely to be compatible. Shipping will be within the same day or the next day after purchase. If shipping is delayed due to circumstances, we will contact you promptly.