Select the appropriate finial code from the table to the right for the diameter and finish of pole you are using.  
pole diameter and finish a. unbeaded b. narrow stripe glass c. tapered fin
19mm stainless steel F-UBD-SS F-GNS-SS F-TFN-SS
19mm black F-UBD-BK F-GNS-BK F-TFN-BK
30mm stainless steel F-UBD-SS F-GNS-SS F-TFN-SS
30mm brushed bronze - F-GNS-BB -