Thi (gender unknown)
decorative ring slipped around a tube, preventing the wood from cracking
Each of the straps with which the 2 halves of the Kav are bound together.
Possibly made of rattan, but Catlin fails to provide us with this important detail.
Catlin, Amy: Hmong musical instruments. In: The Garland encyclopedia of world music (4): Southeast Asia (ed. 2013) *.