M. Deitz & Sons, Inc bases the grades of the vinyl and fabrics shown on our web site and on our fabric ven- dors sites on several criteria – cost, pattern, workability of the material, yield, as well as several other factors. Grading of materials is not always consistent and varies between manufacturers. It is suggested that a cus- tomer requesting a material shown by another vendor contact customer service for exact pricing or grading on that particular piece of material. M. Deitz & Sons, Inc. will not always honor pricing for a material shown by a competitor at that vendor’s grade.