Stamped on a metal plate on sthe inside bottom of the relay.
Printed in white ink on the top of the device.
overall: 3 1/8 in x 3 1/2 in x 3 1/2 in
This is a three pole, single throw contactor with a 220 volt coil and contacts rated at 300 volt, 25 noninductive amperes. The operating mechanism is metal, and the contacts are encased in a black bakelite enclosure.