Practice Pad - Tunable, Grey, Ambassador Coated Drumhead. 6 inch. The Tunable Practice Pad Gray with Ambassador Coated drumhead is the perfect tool for beginning and advanced drummers. The Tunable Practice Pad features a replaceable Ambassador Coated drumhead providing the bounce and feel of a real drum. The Practice Pad can be mounted on a stand for upright playing and has a protective rubber bottom for non-scratch/non-slip table top use.