| Comparison : | Item # BBU-06-S, BBU Series Metric Straight Bulkhead Union Fittings Item # BBU-08-S, BBU Series Metric Straight Bulkhead Union Fittings
 Item # BBU-10-S, BBU Series Metric Straight Bulkhead Union Fittings
 Item # BBU-12-S, BBU Series Metric Straight Bulkhead Union Fittings
 Item # BBU-15-S, BBU Series Metric Straight Bulkhead Union Fittings
 
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