These Type N to SMA coaxial microwave adapters come with vswr's of 1.2 or 1.15:1 at 18ghz. These adapters are offered with either brass or stainless steel bodies. SMA to type N adapters are one of our most popular products. Our n to sma adapters come in either stainless steel or brass bodies. The frequency range of these sma to n adapters is determined by the n connector, either 11 or 18Ghz.