I have been a customer of Calumet Specialty Produc...

I have been a customer of Calumet Specialty Products Partners, L.P. for a while now and I must say, their service is excellent. The quality of their products is top-notch and their customer support team is always there to assist me with any issues or questions I have. I highly recommend Calumet Specialty Products Partners, L.P. to anyone in need of specialty products.