Manokuji's Kujyaku Monkei is quite similar to Kujyakumonkinenkei(in Ouei 20(1413)) kept in Seisouji in Tanto province, such as its form and decorations.
It is made with copper and mixed gold and tin.
Width of top
16.7㎝
Width of bottom
18.0㎝
Length of uebuchi
18.6㎝
Length of shitabuchi
20.0㎝
Height(centre)
8.5㎝
Height of side
8.7㎝
To compare with Kei in Seisouji, the shape of the tail of peacock is
different, both side have jutted out, the shape of bottom line is rather
round.
Kei is an one of the Chinese musical instrument made with stone which
existed long time ago and later became metal.
The model of Torii is made from a tree and it hangs from the middle by
it.
Kei which used in temple also hangs from a frame and it is made to sound
Onritsu ("D"sound).
It strikes using a mallet made from an angle, or wooden, and the sound
which became clear very much is Taken out.
Explanation 
Mantokuji
