A percussion hammer and pleximeter may be purchased from any veterinary instrument maker.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
A percussion hammer is made of rubber or has a rubber tip, so that when the pleximeter, which is placed against the side of the animal, is struck the impact will not be accompanied with a noise.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Percussion is sometimes practiced with the aid of a special percussion hammer and an object known as a pleximeter to strike upon.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler