Sizes - 4 to 34 (dn 100 to 850) for asme class 150, 330 - 4 to 20 or 16” (dn 100 to 500) for asme class 600 - 4 to 12 (dn 100 to 300) for asme class 1500 - 4 to 8 (dn 100 to 200) for asme class 2500 rating asme class 150, 300 bolted bonnet asme class 600 pressure seal bonnet and bolted bonnet asme class 1500 pressure seal bonnet asme class 2500 (pn 420) pressure seal bonnet.