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![](https://m.media-amazon.com/images/I/51OrdvUCQZL._SL500_.jpg "Functional Devices Ribme2401b Low Input/optoisolated Relay, 20 Amp Spdt, 24 Vac/dc/120 Vac Power Input, 5-25 Vac/dc Control Input, 4.00\\" Track Mount")
