The YH10A is a heavy duty angle contact, sealed against outside attack. 18" of 8-core fly lead is provided, encased in a steel armoured sleeve. The sleeve itself is capped with a grommet for ease of installation to junction boxes etc. Magnetic interference detection provides Grade 3 functionality. This contact comes complete with integral resistors, configured by core selection: EOL Resistors: 1k, 2k2, 4k1, 4k7, 5k6. Alm Resistors: 1k, 2k2, 4k1, 4k7, 5k6, 6k8. These resistors cover the majority of leading panel manufacturers including Honeywell, Texecom, HKC, Risco etc. Two YH10A contacts can share a zone, depending on the configuration of the alarm panel (see instructions). Note: The integral resistors MUST be used - this contact cannot be wired 4-wire / traditional. For this purpose, use part code H10A or H10C. Both contact and magnet are 80x25x27mm, angled at 90 degrees from the fitting surface. This contact operates at a gap of approximately 30mm. Supplied with fitting screws.