This is an optical glass 12.5mm wide, 40mm high cell for use in PFXi 195's fitted with cell holder 131907 and PFXi 880, 950 or 995 instruments fitted with cell holder 137530. This size cell is suitable for standard spectrophotometers taking 12.5mm wide cells as well as the EC 2000 Pt-Co and EC 3000 Gardner.