4"x6" STEAM RELIEF 60#25609PPH

4"x6" STEAM RELIEF75#,30845PPH

4"X6"FLG,StmRlf @ 80#,32590PPH

4"flgX6"flg 100#Steam 39570#HR

4"fX6"f 10#Steam 8807#/HR

6"x8" STEAM RELIEF 25# 22,897

6"x8" STEAM RELIEF 15# 17,408

6"x8" STEAM RELIEF 20# 20,151

6"X8" STEAM RELIEF 30# 22,730

6"x8" STEAM RELIEF 71# 48,000