Weinschel 530A-10 Fixed Coaxial Attenuator

The 530A series is a fixed coaxial attenuator (i.e. non-variable) intended for microwave / RF use.

The 530A-10 variant is rated for 10 dB of attenuation.

Frequency range: from DC (or low frequency) up to about 12.4 GHz in many listings.

Connector type is typically Type N, with a male-female configuration (input male, output female) in many units.