- Magnification: 2X, 3X, 5X with a 1.25-inch interface; increases the magnification of any 1.25-inch eyepiece and provides a comfortable viewing experience. - Lens materials: Optical Glass, Aluminum Alloy. - Easy to use: place the eyepiece in the barlow lens, then insert the barlow lens into the frame for quick setup. - Optics quality: multi-coated lenses ensure clear and sharp images for high quality observations. - Compatibility and performance: designed for standard 1.25-inch eyepieces; reliable construction suited for regular astronomical observations. - Practical use scenarios: - Night sky viewing: switch between 2X, 3X and 5X to observe planets and the Moon with varying detail. - Upgrade existing gear: enhance any 1.25-inch eyepiece without buying new components. - Beginner-friendly setup: simple attachment makes it easy for new telescope users to explore different magnifications. - Summary: a versatile Barlow lens solution with multiple magnifications, durable materials, and straightforward operation to improve observing sessions.