If you have questions about our products, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. Visible Spectrophotometer P721 Model:P721 Optical System:Achromatic (1200/mm grating) Wavelength Range:320-1020nm Spectral Bandwidth:6nm Light Source:Domestic tungsten lamp *Subject: *Your Name: User type:PersonalBusinessDistributor *E-mail: *Phone: WhatsApp: Skype: Company: *Content: *Captcha:Math Captcha − 2 = 2 Submit Δ