BBWSG-16 Replacement Glass . Is only made to fit that model BBWSG-16 brass inset cup . The replacement glass includes 1 O-ring ( O-ring included must be used with glass )
To install use provided O-ring and install on the brass BBWSG-16 Diffuser housing. Moisten the inside of the Glass cup and around the O-ring and gently push in . Be careful and do not force the Brass housing . If its difficult use more moisture .