Stacis^®, first introduced in 1996, is the world's most advanced active vibration cancellation system. An active hard-mount, Stacisachieves extremely efficient vibration isolation using piezoelectric actuators and a stiff suspension. Electro-Damp^®, first introduced nearly 20 years ago, was the first active, inertially damped, pneumatic vibration isolator. Electro-Damp^® PZT combines the best features of these two technologies to provide a cost-effective, frame-mountable, stiff, yet extremely efficient, non-pneumatic vibration isolation system.