Comparison : Item # 0005A-1965W, Model SL-4 NaCl Heavy Duty Sealed Liquid Cell
Item # 0005B-1972W, Model SL-4 KCl Heavy Duty Sealed Liquid Cell
Item # 0005C-1979W, Model SL-4 KBr Heavy Duty Sealed Liquid Cell
Item # 0005D-1986W, Model SL-4 CaF2 Heavy Duty Sealed Liquid Cell
Item # 0005E-1993W, Model SL-4 BaF2 Heavy Duty Sealed Liquid Cell