The Laws specify which equipment may be used. In particular, the Laws restrict the design and size of racquets and shuttlecocks. The Laws also provide for testing a shuttlecock for the correct speed:
3.1
To test a shuttlecock, use a full underhand stroke which makes contact with the shuttlecock over the back boundary line. The shuttlecock shall be hit at an upward angle and in a direction parallel to the side lines.
3.2
A shuttlecock of the correct speed will land not less than 530 mm and not more than 990 mm short of the other back boundary line.
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