DOSCH HDRI: Product Environments contains 16 HDRIs for product visualizations - plus the matching backplates.
The resolution of the Spherical Map HDRIs is 21,996 x 10,998 pixel. Included is also a small version of each HDRI with a resolution of 4,096 x 2,048 pixel. The backplates are provided in the Photoshop PSD format, with a resolution of 5,000 x 4,000 pixel.
Each HDR image is provided in the industry standard .HDR. So they are useable in most rendering applications.