Hello l want to buy rebuilt kit for my 3 ton floor Jack G693
The average mass produced trolley jack capacity 1.5/3.0 tons has been for a few decades an item of generic manufacture - copies of copies that are label engineered and with minor differences in detail to suit different price/value brackets.
Unless a jack is a special type such as low entry, lightweight aluminium, quick lift or an extra high lift long chassis type, the standard types are now available so cheaply it is hardly economic to replace many parts as part of a repair, especially as such parts that tend to be available through the dealer tend to be grossly overpriced. A seal kit where available as a spare part for the jack from the brand dealer is likely to be similarly overpriced.
The most economic method is to buy such seals that are needed from a local hydraulics specialist, of which there is certain to be at least one in every town.