Buy relay and housing

Relay: 1, Dimension: 15.5 * 15.5 * 19.2 (about) 2,7 A30VDC3, three-legged or four-footed, a group of normally open contacts. 4, power less than 1w (DC12V). Housing: After the breaker wire, into the cited case, the filling epoxy resin sealed. The shell length and width of 22 * ??16.8-16.9mm, can be packed into the breaker. Shell height of 20mm or more.