Anything Selden makes is a good thing as they are a top notch company with top notch gear. Now the sprits are good for getting that asymmetrical spinnaker away from the mainsail so that you can keep cleaner air in it so it performs better. The Selden sprit accommodates that need. They have different hardware attachments to help fit different situations and if you don't want it on deck, it is easily removable. There are different collars, for example to best accommodate your particular application. The last one installed was on an S-2 9.2A to answer your question.