DynamO
The DynamO is a hole cutting template for resonant Bass drumheads that provides a vent hole for all drum mics. The DynamO is a laminated Mylar with a high strength adhesive backing providing added durability for the drumhead to prevent tearing when adding or removing microphones. Available in black and white sizes 5.5", 7", 9" and multi packs.

Specs

High strength adhesive backing
Provides vent hole for all Drum Mics
Provides added durability to the vent hole when using bass drum microphones
Available Black and White sizes 5.5, 7", 9" and multi packs
Resonant drumhead hole cutting template