I purchased the National Extra Tall wind screen to replace a Givi D1136ST screen I bought to replace the stock wind screen. Although the Givi was an improvement over the stock screen, it wasn't tall enough to push the air over the top of my head. I ride 90% of the time with just a ball cap and sunglasses, and the low stock screen and Givi just pushed too much wind on my chest and face. It blew my hat off and made my eyes water. Enter the National screen....at a full 6" taller than the Givi. I'm 5'8" and it is the perfect height for me. It pushes the wind (and bugs) over the top of my head and allows me to wear a ball cap and sun glasses without any wind turbulence. It came with all mounting hardware and was a cinch to put on. It literally took 5 minutes to remove the 4 bolts and remount the new screen. My only regret is that I should have just bought the National screen the same day as I bought the PCX 150.