Specifications:Wavelength: 1064nm(900-1100nm) For Fiber Laser BeamTransmittance: >99.76%Laser Lens Power: 0-6KWSize: D27.9x4.1mmProtective Lens - Green (D27.9 x 4.1)SKU: 180Quantity*Add to CartRETURN & REFUND POLICYNon-Refundable SHIPPING INFO2-3 Days for Available stock Items 7-14 Days for Out of Stock Items