This H2O Pro 40/60 PSI pressure switch (Lowe's #5741830, Model# 148184) is a polyethylene-bodied switch designed for use with well water pumps and pressurized water systems. Dimensions are approximately 4" x 4" x 3". Activates the pump at 40 PSI and shuts off at 60 PSI, maintaining consistent water pressure throughout the home. Like new in original box with no damage or missing parts reported. Compatible with standard residential pump setups.