Please indicate the following in the comments section when ordering: Bike model year, rider height and rider weight. This is important for us to ensure the seat will fit properly for you. It will also speed up the delivery process if we have this information up front!Important fitment note: Designed for Ultimate Seats that are backrest ready ONLY. Will not work with other seat brands.For F6B Deluxe Models:The Ultimate Deluxe model F6B passenger backrest (replaces stock deluxe model) Our Ultimate backrest mount is 3 inches higher than stock for full comfort support.Our backrest installs directly onto the stock deluxe base plate.If you choose to use the stock pad you can change to the Ultimate 3 inch taller mount bracket only which installs onto the stock base plate using the stock bolts.Can not add the Ultimate removable passenger backrest later.Ultimate Backrest pad is 10" wide x 7" high.For F6B Standard Models:The Ultimate passenger backrest for the Standard model F6B has been designed for quick release (mounts into the seat) and is height and position adjustable and 3 inches and 4 inches taller than the Honda optional backrest, our backrest eliminates back fatigue and creates more room. The Ultimate removable passenger backrest can be added anytime.Ultimate Backrest pad is 10" wide x 7" high.Our F6B seats are offered in our marine grade premium black vinyl with our carbon fiber inlay in dark grey or red included.Our standard seat stitching thread color is black.