• I believe one is a 5000lb lift and the other is either a 4000 or 4500lb lift.
• They come with pumps but I don't think the pumps work. (Pumps, I believe are less than $100.00.
• The only thing that I know is missing is one of the sets of brackets (I have one set) that attaches the dock to the lift (the one set that I do have will fit either dock, it's just one of the lifts will need another set).
• They look simple to have made (the brackets) and I have a pattern available.
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