The washer is shaped as a peach with a circular aperture, borne on a leafy branch and accentuated with a bat in flight. The glass is of ruby-splashed opaque white with the branch and the bat picked out in translucent ultramarine and purplish blue. The flat base is wheel-cut with the reign mark in kaishu script.
The organic shape of this glass washer probably derived from jade pieces of 17th and early 18th century, such as the jade washer in the National Palace Museum, Taipei, illustrated in Wenfang Juying, National Palace Museum, Taipei, 1996, p. 173. Compare also the red overlay white glass washer decorated with bats in the Palace Museum, Beijing, illustrated in The Complete Collection of Treasures of the Palace Museum – Scholar’s Objects, Hong Kong, 2009, no. 197, p. 206, which bears a very similar mark to the current piece (fig. 14).