Features: This adjustable adapter module features a manual mechanism for precise control of size from Φ1 to Φ12mm, offering flexibility to optimize intensity and size for diverse applications. Constructed with highly quality stainless steel and aluminum alloy opt materials, it ensures superior light transmission, minimal scattering, and a stable standard interfaces for easy compatibility with most engraving devices. Ideal for both beginners and professional in technology fields, this user friendly device caters to anyone needing accurate beam management in settings like workshops or labs. Perfect for engraving, cutting, and measurement tasks, it enhances efficiency and precisions by effectively controlling output in industrial or experimental environments. With its straightforward manual operating, this variable diaphragm allows quick on the fly adjustments, making it a reliabled accessory for versatile setups and improved workflow. Specifications: Component: stainless steel, aluminum alloy Dimensions: 19.8x19.8x5mm; 27x27x7mm Weight: 50g Specifications: 19.8mm / 27mm Optional Package Includes: 1PC Adapter module variable diaphragm note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.