BBWSG-19 Replacement Glass . Is only made to fit that model BBWSG-19 brass inset cup . The replacement glass includes 1 oring ( Oring included must be used with glass )
To install use provided oring and install on the brass BBWSG-19 Diffuser housing. Moisten the inside of the Glass cup and around the oring and gently push in . Be careful and do not force the Brass housing . If its difficult use more moisture .