“tried the 20% & 25% thc...do you have a 40% what are the grades?”

At the present time 25%, with some allowable variance, is the highest THC level product we have available. There may be higher THC varieties made available to us in the future, by the licensed producers.

Keep in mind, that with higher levels of THC there can be more negative effects - this is why it is important to start low and go slow, particularly when trying a product you have not tried before.