Large wooden guiro, fish style including scraper by Stagg. 

38cm

The güiro is a percussion instrument consisting of an open-ended, hollow gourd with parallel notches cut in one side. It is played by rubbing a wooden stick along the notches to produce a ratchet-like sound. The güiro is commonly used in Latin-American music, and plays a key role in the typical cumbia rhythm section. 

from: www.wikipedia.org