Depends on size of the boat. One on each end and then one eui distant in the middle

JAMES ZIOGAS

I used them as "bump points" on corners both vertical and horizontal coming into my lift. The fact that they stick out a bit is appealing as the fit is narrow and cross wind prevents bump free landings. I can then correct and guide to the next pont without hitting wood. My posts are about 10 feet apart and I used 1 horizontal in between and of course on all horizontal corners. The vertical straight pieces are effective over the 1' tide range we have on the lower Gulf Coast. Be sure to use stainless screws in salt water. Very effective system! Jim

JAMES COLLINS

The corner peices simply wrap the corners. You can pivot on them when it is windy. If you are going to rub a side as you dock, then cover the intire langth of the slip to avoid contact with the dock.

CHARLES FRASCH

I used only one bumper in the front of the well to protect the front of the boat. I'm not sure about the spacing, sorry.

KEN MARTIN

Sorry I only bought the corners and installed them. I can tell you that the corner piece was hollow inside - the reason that I know is because I had to shorten one leg of the corner and ended up putting spray foam in the space.

TONY DUVALL

I'm not sure what you mean by the "other dimensions", but the size I bought is 36"L x 4"W x 5.5"H. The weight I'm not sure about either, but it is definitely heavy duty and a good product. I did have a problem because I used it at the front of my dock to cushion if the boat moved too far into the slip during docking. The front of the boat has a tendency to "ride up" on the bumper and strike the attachment bolt if you are moving a little fast. That's not the bumper's fault though!

KEN MARTIN

Thanks for the info, Tony. Bill

bill allen

Thanks for the info Ken. That's what I needed. The webpage only provided length not height and width. Thanks again.

bill allen