Wooden recorder in german system ( pipe,svirel, block flute, flute, whistle). Key С major 6+1 hols. Housing material -  Siberian tayga birch wood, impregnated with oil. Block, ie inserting a whistle made of cedar oil is not impregnated, so that moisture is absorbed in the game. Also, the outside is covered with a natural shellac for protection and strength. Direct sun is not afraid. When you get wet wipe, dry. Falls are not terrible - just spoils the appearance. Do not attack without knocking. Typically, the tissue is stored in a case. Shelf life and the game is not limited. Length is 34 cm.
I draw your attention that the instrument setting temperature is 22-25 degrees Celsius (71-77 Fahrenheit). At higher temperatures, the pitch of notes may be higher.
This video with sample sound -

свирель(recorder,whistle) С - YouTube

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