Cloudray Laser Ceramic Nozzle Holder Diameter 34.5mm Height 16.7mm for Fiber Laser Cutting Head Go to amazon.com Related posts Expert choice for precitec laser head FeatureMaterial: High Quality CeramicSize: Diameter 34.5mmThickness: 16.7mmCan undertake 500-5000W laser power.Fit for Fiber Laser Cutting Machine.