The product is a replacement bayonet lens mount designed specifically for the Sony FE PZ 28-135mm F4 G OSS lens. This unit is compatible with Sony digital SLR cameras and is an authentic Sony product manufactured in China. With a unit quantity of 1, this lens mount allows for easy installation and ensures a secure connection between the camera and lens for optimal performance. It is a reliable and high-quality part for maintaining and upgrading your Sony camera system.