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DC Dust Cap Coupler SIZE Part Number 1/2" DC 050NG 3/4" DC 075NG 1" DC 100NG 1-1/4" DC 125NG 1-1/2" DC 150NG 2" DC 200NG 2-1/2" DC 250NG 3" DC 300NG 4" DC 400NG Handles available as:Stainless Steel and PP All 4" Ny-Glass Couplers have 4 handles.