20x3mm
20x4mm
19.9x2mm
20x2mm
Brand Name:JHCHMX
Origin:Mainland China
Model Number:Laser Welding Protexctive Windows
Diameter:19.9/20mm
Thickness:2/3/4mm
Material:high-quality quartz.
withstand power:0-2000W
Application:Hand-held Laser Welding Head
Package:10 pieces a lot