we are from Goldsail laser Ltd in China. we are manufacture of laser lens/mirror ,laser tube and power supply.we can provide 40W-150W laser tube and 40W-150W power supply.laser Focus lens : Focus length=38.1mm ,50.8, 63.5,38.1, 75, 101.6 ?ia=19.05mm -20mm?aser mirror:Dia=20mm, 25mm , If you need, pls send email to me thank you so much!!!(salesATgoldsail.net) .