Everyday we ship out calibration test weights to our 1800scales.com customers. Many customers love our cast iron grip handle weights, while others rely on our NIST Class F stainless steel cylinder weights and portable weight kits. We offer the test weights themselves or you can add a traceable certificate if you're quality control department needs the documentation. Technology, Experience, and Commitment best describe our weight sales department. 1800SCALES.com offers only the best calibration test weights available. Our weight suppliers have been supplying high-quality precision measurement products and services for over 30 years. The combination of world class manufacturing technology, an experienced staff of professionals, and a commitment to total quality enables our weight suppliers to lead the industry in attaining a variety of quality certifications including ISO 9000 and ISO/IEC 17025. Most of our test weight orders ship out within a day or two. If you order a traceable certificate, that can add about four extra days to the lead time. Also, each weight that we supply is made for you so please carefully make your weight selections as we do not accept returns.