Waygate Krautkramer K-PEN [389-042-200] Style Delay Line Contact Transducer, 7.5 MHz. GE K-PEN Style Delay Line Contact Transducers consist of high-resolution pencil type probes. K-PENS design allows users to work in tiny contact areas, such as tightly curved surfaces of turbine blades or remaining wall thickness measurements from a pit bottom. K-PENS are also compatible with most flaw detectors, precision thickness gauges, and general pulse/receiver units. Probes come with interchangeable delay tips that are tapered to a 0.65 inch and 0.90 inch contact diameter. This transducer has a Micodot connector. Please note that cable is not included.