DufLine® site indicators come in housing materials made of DI Casted ASTM A395, with flange dimensions conforming to ANSI B16.5#150 standards. Our products feature PFA linings as per ASTM D3307 and undergo rigorous testing in line with ASTM F1545 (2009). The exterior is protected by a two-layer epoxy primer. Additionally, DufLine® offers double window sight glass in SS for enhanced durability and visibility.