Case sizes: 1.5", 2", 2.5", 3.5", 4", 4.5", 6", 8", and 10" Case material: Steel case, steel black case, steel chrome plated case, steel gold plated case, brass polished case, stainless steel case, and all this can take with front flange, back flange and U-clamp. Bezel material: Steel black bezel, steel bezel, chrome plated bezel, brass bezel, stainless, Steel roll ring (or bayonet threaded ring) Tube and socket: Brass, stainless steel, steel with nickel plated, 316 stainless steel, phosphor bronze and more Movement: Brass, stainless steel Connection: 1/8", 1/4", 1/2", 3/8", NPT, BSP or BSPT dependent on model and size; Bottom, back left and right side connection Available ranges: 30Hg "- 0-15-10000PSI Windows: Acrylic, glass and polycarbonate lens are available Accuracy: ASME B40.1 Grade B (+3-2-3%) Options and accessories: Custom dial, metric scale, DIN 2.5% accuracy, recalibrators, restrictors, special connections and more