The RIB brand on this relay is simple and clear, which you will find helps when labeling the panel.
2PCS Power Relay AC120V Coil, 30A SPDT(1NO 1NC) with Flange Mounting and 10 Quic
A nice touch on the LY2N Relay IEC255 is the consistent build, with the same feel across several units I ordered.
The BU1 AC carries a calm, steady feel in the hand, and the click is firm.