Dear friend,Should any of our products are interested to you ,Please contact with us .We will give you low price& high quality. Diameter: 23,25,27,30,35 We can supply various of fire extinguisher and accessories ,such as powder valves, co2 valves, water/foam valves and cylinder,bracket,pressure gauge,fire hose,fire cabinet ,and also some of them are with CE approval. fire pressure gauge