American Photonics 16mm diameter lens tube with ZnSe focus lens or 4pc lens kit, Alignment Tool + APC Adaptor(Kit PN#16.1550-KIT4-RLA) 🌈 Easy-Peasy Lens Cleaning: Say goodbye to smudges and hello to clarity! Clean your lens without even touching it. 🚫✋ 🎯 Stress-Free Focusing: Our lens is glued into the tube, ensuring stress-free optical focusing. 🧘‍♂️ Select Your Focal Length 👇 38.1mm (1.5") 🎯 50.8mm (2.0") 📏 63.5mm (2.5") 📐 101.6mm (4.0") 📏 🔢 Kit Part Number: 1623-KIT4-RLA-A ⚠️This kit is for newer Omtech® machines with a different laser head than the 16.15mm kit. See below.  Your browser does not support our video. Brand - OEM Machine Lens diameter Mirror link RLA Alignment Tool Kit link Omtech AF-2028-60 watt (new) 18mm 25mm 16.15 RLA 16mm kit Omtech AF-2028-80 watt (new) 18mm 25mm 16.15 RLA 16mm kit Omtech AF-2435-80 watt 18mm 25mm 16.15 RLA 16mm kit   Watch video to select the correct glued lens tube for your machine. APC holds a +/- .15mm(.006") tolerance on focal length on all of our lenses. The distance from the front of the nozzle to the perfect focal point is 10.5mm (the same as a AAA battery) Please allow us to mount your lens for you to the highest standards, in the best possible environment. Disclaimer: All parts advertised for sale are made by or for American Photonics. Trotec®, Fullspectrum®, Epilog®, Universal Laser®, Synrad®, FSlaser®, IPG®, Amada®, Bystronic®, Cincinnati®, Mazak®, Mitsubishi®, Laserlab®, Laserdyne Prima®, Precitec®, Strippit®, Trumpf®, and any other trademarks not owned by APC are registered trademarks of the respective owners with which they are associated. APC is an independent site and company that is not affiliated with above-named manufacturers, and the use of the names, trademarks, and part numbers is for reference, identification, and compatibility purposes only.