Bird 43 4431 Thruline Wattmeter Watt Element Slug Reading Meter 2x 5x PEP peak
The Bird 4431 is an insertion-type. This has a 2x 5x PEP Peak Kit installed. The scale is graduated for 25, 50, and 100 full scale. provides direct readings in watts with an expanded scale for easy. plug and play ready.