Check the listing for details. Evans B10G1 10" G1 Coated Drum Head. Condition: Open box. Listed at 24.23 USD. Evans B10G1 10" G1 Coated Drum Head The single-ply industry standard, G1s blend warmth, sustain and articulation. The high-performance 10 mil film ensures that the G1 is both durabke abd expressive. The coating adds additional warmth, focus, and depth. Packaging shows signs of wear.