Piezoelectric Extending Transducer (D220-A4BR-2513XE) Meta||Unit Cost @ Qty. x100||$330.00 PSI-5A4E is an industry type

PSI-5A4E is an industry type 5A (Navy Type II) piezoceramic

These transducers are often referred to as benders

The motion in the thickness direction is on the order of tens of nanometers

The bending disks bow in and out like a drum head

Piezoelectric Extending Transducer (D220-A4BR-2513XE) Meta||Unit Cost @ Qty. x100||$330.00 PSI-5A4E is an industry typeA 2 layer element behaves like a single layer when both layers expand (or contract) together. If an electric field is applied which makes the element thinner, extension along the length and width results. Typically, only motion along one axis is utilized. Extender motion on the order of microns to tens of microns, and force from tens to hundreds of Newtons is typical.