Abstract: Attachments for an ultrasonic transducer used to measure discontinuities in a test specimen. The attachments constitute a series of liquid applicator heads selectively attachable to the transducer in accordance with differently contoured test specimens and specimen materials. Each applicator head is adapted to distribute a film of coupling liquid to the test specimen to improve energy transmission between the transducer and specimen.The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without payment to me of any royalty thereon.