3M 7000031716 4.5" Dyna-Coupler 4001
3M Dynatel Dyna-Coupler is water-resistant and capable of withstanding short-time immersion. This coupler is compatible with 2250/2273, 2220M, 2250M/2273M, 2550/2573 model locators.
Allows coupling of RF trace tone to large diameter pipes, bundle cables, etc.;Helps in locating underground facilities;Compatible with 2210,? 2550,? 2273,? 2573,? 2273M,? 2250,? 2220M,? 2250M model locators;Water-resistant construction is capable of withstanding short-time immersion;Operates at a temperature range of -4 to 122 degrees F (-20 to 50 degrees C)