Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Are they sold as a pair , how many do you get for $ 95.89
Document: If your wife is an expert at loading the boat in any weather conditions and you know nothing about the subject then this is your answer. We purchased a 1973 Starcraft earlier this year and always struggled to load it. Despite the large bunks on the bottom and keel rollers, the stern of the boat was almost never centered on the trailer when we pulled out of the water. With these guides, I can now drive onto the trailer.
I highly recommend the guide posts.
Fairly straightforward to install. However, as with most universal mounting kits, the fit is never perfect. There is a 1/2 inch gap between the frame and the U bolts. So far it hasn't moved. However, I plan to install some kind of shim to prevent any possible movement. The brackets are well made, and the steel tubing is much longer than other kits I searched before buying this one. As anyone who has ever backed an empty boat trailer down the ramp knows, visability matters.
Answer: no