Case sizes: 1.5", 2", 2.5", 3" and 4" Case material: ABS case Tube and socket: Brass, stainless steel, steel with nickel plated, 316 stainless steel, phosphor bronze and so on Movement: Brass, stainless steel Connection: 1/8", 1/4", 3/8", 1/2", PT, BSP, NPT or BSPT dependent on model and size, bottom, back, left side connection Available ranges: Vacuum and compound through 500psi, 600psi, 5000psi, 10, 000psi and so on Windows(Lens) material: Snap on plastic window, snap in plastic window, screw in polycarbonate window, plastic welded window Accuracy: ASME B40.1 Grade B (3-2-3%) Options and accessories: Custom dial, metric scale, DIN 2.5% accuracy, restrictors, special connections and more