https://www.troemner.com/Calibration-Weights/Hooked-Weights-and-Slotted-Weights/Hooked-Weights-and-Hooked-Weight-Sets/Weight-2P-HTO-1oz-CL6-Accrd-TR/p/80851607
1oz Certified Hooked Weight HoT ASTM Class 6 (RPLC NIST Class F), 80851607
1oz Certified Hooked Weight Hook on Top ASTM Class 6 (replaces NIST Class F) with an Accredited Certificate Item ID 80851607