Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

Thorlabs
The Thorlabs 390036-E is an unmounted Geltech aspheric lens featuring a focal length of 4.00 mm and a numerical aperture of 0.56, released on April 21, 2010. This component includes an anti-reflective coating optimized for the 3 to 5 µm wavelength range and has an individual package weight of 0.03 lbs. Submit the exact part number, quantity, and application requirements for a formal quotation.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Thorlabs 390036-E. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.