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Comparison : Item # 637-W15-221-012, 637W Series Waterproof High Density D-Sub Connector with 15 Machined Pin Type Contacts
Item # 637-W15-222-012, 637W Series Waterproof High Density D-Sub Connector with 15 Machined Pin Type Contacts
Item # 637-W26-221-012, 637W Series Waterproof High Density D-Sub Connector with 26 Machined Pin Type Contacts
Item # 637-W26-222-012, 637W Series Waterproof High Density D-Sub Connector with 26 Machined Pin Type Contacts
Item # 637-W44-221-012, 637W Series Waterproof High Density D-Sub Connector with 44 Machined Pin Type Contacts