Size 49 x 34 x 55 mm. Configuration: two groups of four pieces (eight lenses total). Lens types: F6.3 Decreasing Lens and F6.3 Correcting Lens. Key benefits - Enables targeted focal control in compatible optical assemblies with F6.3 lenses. - Flexible options provided by two lens types in one kit (decreasing and correcting). - Compact size facilitates integration into small optical systems and lab setups. - Clear specification supports planning and alignment in assemblies. Specifications and compatibility - Size: 49 x 34 x 55 mm - Structure: two groups of four pieces - Lens designation: F6.3 Decreasing Lens / F6.3 Correcting Lens - Compatibility: designed to fit standard optical configurations that accept 49 x 34 x 55 mm components Applications and use scenarios - Optical bench experiments and alignment tasks in research or education settings. - Classroom demonstrations of lens behavior, focal adjustment, and image correction. - Replacement or upgrade components for compact imaging devices and DIY projects that require precise F6.3 lenses with the specified dimensions.