o-ring ,FON-113 acc. to 110X5 mm pump element 28 mm Lorange PEO-U831 NA.NA.165002 o-ring , FOF-281 acc. to 63X3 mm NA.NA.165005 o-ring , FOS-28 acc. to 62×3 mm NA.NA.165004 o-ring , FOS-25 acc. to 52X3,5 mm NA.NA. 165003 NA.NA.165031