This product is a modified version of the rear speaker baffle being sold, allowing for 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 listed baffles: Specifically designed for Suzuki Jimny (JB64) Sierra (JB74). This is the necessary baffle for installing rear speakers. Designed and manufactured using a 3D printer, and its installation has been confirmed. Made of PLA (plastic), it is resistant to moisture and less prone to degradation. Installation has been confirmed with TS-F1640. Other speakers are also likely to be compatible. Shipping will be done within the same day or the next day after purchase. If shipping is delayed due to circumstances, we will contact you promptly. The texture is slightly more matte than the photos due to a change in the PLA used.