This product is an improved version of the rear speaker baffle we are selling, designed to accommodate speakers with an inner diameter of 140mm. Please be sure to check the dimensions to confirm compatibility with your speakers 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 its fit has been confirmed through actual installation. 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 occur within one day of purchase. If shipping is delayed due to circumstances, we will contact you promptly.