White-Rodgers 47D01U-843 Heat Pump Defrost Control Board, Universal Replacement Type_Accessories Capacity Fittings: 3/8 - 1

Capacity Fittings:  3/8 - 1 1/4

The MARS refrigeration potential relay service kit has become an industry standard since its introduction over fifty years ago

Multi-Bit Screwdriver / Nut Driver shaft holds 8 popular tips and converts to 2 nut driver sizes

or ad-hoc web server

L38-801 Lennox:

White-Rodgers 47D01U-843 Heat Pump Defrost Control Board, Universal Replacement Type_Accessories Capacity Fittings: 3/8 - 1White Rodgers 47D01U 843 Heat Pump Defrost Control Board, Universal Replacement Universal Single Stage Heat Pump Defrost Control for PSC replaces most single stage defrost controls offering enhanced energy efficiency through demand or time temp defrost modes and provides compressor protection through short cycle time delay and brownout protection. Replaces over 400 single stage defrost models Selectable timed defrost or demand defrost mode for greater