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 355440-C is an unmounted aspheric lens featuring a focal length of 2.8 mm, numerical apertures of 0.26 and 0.52, working distances of 2.0 and 7.1 mm, and an antireflection coating for 1050 to 1700 nm. Released on October 30, 2014, each unit has a package weight of 0.04 lbs, with lifecycle status available in current manufacturer documentation. Submit the exact part number, quantity, and application requirements to request a quote.
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 355440-C. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.