Bild Cam & Groove In-Line Sight Glass Adapter x Adapter Markets Dry Bulk Cargo Truck Jump to Section Product Options Related Products Product Options Part Number Adapter Size Seal Material 3533AA 3" x 3" Nitrile Rubber Aluminum 3534AA 3" x 4" Nitrile Rubber Aluminum 3544AA 4" x 4" Nitrile Rubber Aluminum Related Products Bild Cam & Groove Coupler x TTMA Flange Bild Cam & Groove In-Line Sight Glass Coupler x Adapter Bild Cam & Groove In-Line Sight Glass Coupler x Coupler Bild Cam & Groove In-Line Sight Glass Repair Kit Bild One-Piece Aluminum Butterfly Valve with Iron Disc