Sonor ProLite 20"x17,5" Bass Drum, Color Walnut(-75), Version Matte/Satin Semi Gloss lacquered Shells, chrome Shell Hardware, with Bass Drum Rosette, Shell Construction: Vintage (Extra Thin), Shell Thickness: 12 layers = 6 mm + 2 mm Dynamic Edge, Tension Rods: 2 x 8 pieces, all Shells with a 45° bearing Edge in handselected extremly Thin 100% Maple Wood with Reinforcement Rings for a open Sound with warm Tone and excellent balance between Mids and Hi Range, all Lugs with Tunesafe,