The L-com FOATSC-55-20D is a bulkhead attenuator for 1550nm wavelength and is rated for 20db. The L-com FOATSC-55-20D is the perfect solution for attenuating Single mode fiber connectors for both lab and commercial applications. The FOATSC-55-20D is constructed of the highest quality materials, is factory tested, and are In Stock. Order today!