A practice hitting tee has a support structure and a ball holder. At a receiver side ) predefined characteristics of a received signal are measured. The minor body is preferably composed of a composite material and has a crown section and a ribbon section. A material obtained by adding a low melting point metal in an amount specified above to, for instance, Al and then fusing and melting the resulting mixture is quenched and solidified within a non-oxidizing atmosphere to thus form an Al composite material. There are more than twice as many smaller fins than larger fins per distance perpendicular to the fins.