The CoverMate 1 comes with two different style mounting brackets depending on which type of unit you are using them on. The main picture of the CoverMate 1 is the standard bracket and then there is another picture under more views of the Master Bracket. The standard bracket can be used on any hot tub. If you are replacing the cover lift for your swim spa and the swim spa is built before 2015 then you would want to order the Master Bracket. The Master Bracket attaches to the wood in the corner upright to give it more support. Also if you are replacing the lift on your swim spa and it is 16' and larger you would also need to purchase the extended pivot arms.
You will need to choose between which bracket you would like and then if you would need the extended pivot arms.