Hello drummers, These Alesis Clamps Originally Come with the Alesis Surge Kit but they are compatible with Strike, Crimson, Surge, Command and DM10 Kits

The 1.5 Diameter is 1.5" Inch.

I usually ship everyday.  If order is placed before 4 PM Eastern Time it will go out the same day, otherwise the order should be out the next day.

The Sale included 2 Clamps.

Let me know if you have any questions or fast shipping requirements.