Item ID: 131095 1 Offered at Best Price MKS 638B-15473 Control Valve MKS 638B-15473 Control Valve 7.5" Total Diameter 4"(101.6mm)Butterfly Location: Plano, TX, United States Unit Price Unstated Number of Units 1 Manufacturer MKS Instruments (as Part Manufacturer) Model 638B-15473 Other Information There is also a MKS 253B-11203 Control Valve in stock Condition Excellent Make OFFERSend QUESTIONS