The vapor bowl consists of a bowl, connector and glass nail. Use it to adapt any standard commercial glass bong for vaporizing oil and other liquid essences. With this system only the connector can be filled with essences in the lower part. SG top 19F, SG bottom 14. To fit it to an SG 19 connection, order the adapter No.: 08 18 02 as well. More information about smoking oil or essence you will find at this infopage.