These are all sharpened and balanced props. The first two are the ever popular 2719 & 2819 in the low lift 19 degree rake .38 BAR ( bar= blade area ratio) Good rigger and sport props. The third prop is a 2727/2 23* SAW prop. It is a prop for doing SAW runs with. Not a heat race prop. The last prop is a PSR-NB1. Great cat prop. It is a prop that has been around a long time and guys here in the USA never knew it existed. Long story behind it, but it is a out of the package modded prop. You can see just how much cup is in the blades. The PSR mold is a old mold and they do sometimes have some little marks on the props, but nothing that will effect the way the prop runs. Like this one has a couple small marks on the hub. These props are $50.00 each and USA shipping is $5.00.