This 3M Spectacle Kit 6878 - 102 is designed to fit both the 6000 and FF-400 series of respirators. The kit includes a frame, spectacle kit clip, and elastic band. It is made in the United States and can accommodate prescription eyewear. The kit is compatible with 3M's respirators and can provide added protection and comfort to the user. It is a great addition for those who wear prescription eyewear and need to wear a respirator for prolonged periods.