I run a HVAC/R supply house and want to increase my inventory with the right refrigeration parts. I have access to all of the major brands, i.e. Ranco, Johnson Controls, etc. I want to make sure that I have the right parts in stock for most service calls for my customers. Can anyone supply me with a list of the most common parts that are used for refrigeration? Maybe your truck stock list? Manufacturer brand and model numbers will be greatly appreciated. Thanks.