They will be similar to the cat weights shown in Mod Stock except they are bushed rather than set screw design.
The Polaris weights are available in 56 - 74 gram for $199/set and 56 -94 gram for $249 which include heavier tungsten buttons for additional weight... I cant imagine any 800 that would need more than the 74 grams.
Once you get good with tuning this kind of weight... The heavier tungsten inserts would be handy if you had a specific gram number you wanted but needed to add that more to the heel or to the tip.
Tuning this weight adds another dimension to clutch tuning... and some complexity if you are not good with that kind of thing.
It is as much about the position of the inserts on the weight/cam as it is about how much weight is added.
This is the SAME exact profile as the Polaris Series 10 weight
They are OK for the quick change but I like the profile of the mtx weight better. The mtx works better imho than the poo 10 series,and the rooster is a copy of the 10. However they are super easy to dial in and change weight.