Chainmail Joe Bright Aluminum 1 Pound Chainmail Jump Rings, 18SWG 1/4"ID You are looking at one pound of quality Bright Aluminum jump rings for making outstanding jewelery or mail armor. These rings are saw cut by an extremely precise jewelers saw (0.008" thick) to make perfect closings for your projects. They are made of Aluminum Alloy 5356, which has 5% Magnesium and makes for a much brighter finish than regular aluminum and doesn't oxidize(no blackness ruboff). They have been cleaned and polished and are ready to use! Aspect Ratio(AR) = 5.3 The dimensions of the rings are 1/4 inch(6.4MM) Inside Diameter and roughly 11/32 inch(8.8MM) Outside Diameter The wire is 16AWG/18SWG or 1.2MM in Diameter There are at least 6400+ rings in each pound bag, we always include several hundred extra just in case there are any defects from the manufacturing process.