Hard to Find Shark Gills07/25/2012 ByWilliam Mattox I have been looking for these things for about 5 months and finally found them here. I was one "gill" short and was hoping to buy only 1 but I now have 5 more for future use. There is a difference in the way they left and right side fit so it is not one size fits all. Install was a breeze once i figured that out. When you hold your mouth right and hop on one foot they pop in just like butter. Seriously, install was pretty simple and now I have all 6 vents chromed ... priceless!