BD 22" x 17,5" (no Mount), TT 12" x 08", FT 16" x 15", Birch Innovative, versatile and modern - That is our SQ1 Series. The European Birchwood shells and the exclusive shell layup, developed especially for this series, provide a versatile sound spectrum with balanced lows, mids and highs, that convinces both live and in the studio. The innovative Sound Sustainer enables complete isolation between the mount and the shell. The matte lacquer finishes combine both elegance and a modern appearence. Technical specifications Shell Sizes BD 22" x 17,5" (no Mount), TT 12" x 08", FT 16" x 15" Shell Material Birch Shell Medium-Heavy Birch Wood Shells Shell Layup 7 Plies for TT & FT (7mm) / 12 Plies for BD (10mm) Bearing Edges 45° Tom Suspension System Sound Sustainer Mounting System Hoops 2.3mm Power Hoops on TT & FT, Lacquered BD Wood Hoops Lugs SONOR Single Lugs, Hole Spacing: 32mm Hardware-Finish Chrome Badges SQ1 Badge, 40x60mm Shell Manufacturing CLTF (Cross Laminated Tension Free)-Method, OSM (Optimum Shell Measurement) Other Features TuneSafe System