The Cympad Undertones hi-hat stand pack includes three hi-hat leg undertones and one hi-hat pedal undertone made of cellular foam that decouples your stand from the floor, adding significant sustain to your sound. The proprietary non-skid material on the underside helps anchor your drums and hardware securely on any surface, reducing the need for drum rugs. You'll get a fuller, richer tone from your hi-hats and an extra layer of protection for your pedals and stands.