Comparison : Item # 0005A-2899W, Model SL-2 NaCl Sealed Liquid Cell with rectangular (dispersive) aperture
Item # 0005B-2906W, Model SL-2 KCl Sealed Liquid Cell with rectangular (dispersive) aperture
Item # 0005C-2913W, Model SL-2 KBr Sealed Liquid Cell with rectangular (dispersive) aperture
Item # 0005D-2920W, Model SL-2 CaF2 Sealed Liquid Cell with rectangular (dispersive) aperture
Item # 0005E-2927W, Model SL-2 BaF2 Sealed Liquid Cell with rectangular (dispersive) aperture