Check the listing for details. CSRU2 208/240VAC 88-108uF Compressor Saver Hard Start Kit for 3.5-4-5 Ton System. Condition: New. Listed at 425.00 USD. The CSRU2 208/240VAC 88-108uF Compressor Saver Hard Start Kit is designed specifically for 3.5-4-5 ton HVAC and refrigeration systems. This kit includes a capacitor with a capacity of 88-108uF to help reduce the strain on the compressor during start-up, ensuring smoother and more efficient operation. Ideal for businesses and industrial applications, this product is a reliable solution for maintaining the performance of your heating and cooling system.