... to brassSpecifications:Case material: stainless steel case with front flange, back flange and U-clampBezel material: stainless steel bezelBezel material: steel ... /2 inches, BSP, NPT or BSPT depending on model, size, bottom, back, left and right side connectionsAvailable ranges: vacuum and compound through ... : PC is standard, glass optionalAccuracy: 1.6 or 2.5Case size: 1.5, 2, 2.5, 4 and 6 inches