This is a single contact block, ZBE101, for standard application contacts. Features: 1. Compatible with Harmony XB5, XB4 push button 2. Front mounting on push button collar. 3. Has 1NO contact type and composi D14:E28tion. The contact operation is slow-break. 4. Contains screw clamp terminals Specifications: size: 22 mm product weight: 0.02lbs ATI uses on the safest and most reliable products. This contact block is certified according to industry standards: CSA, RINA, GL, BV, UL, CCC, DNV, GOST, LROS.