TierraCast 4mm Round Jump Rings are made with 20 gauge (0.8mm) wire and have an inside diameter (ID) of approx 4mm and an outside diameter (OD) of approx 5.4mm with an aspect ratio of 4.7 (AR). These are sawcut plated brass open jump rings.
Use these jumprings for making chainmail jewelry or to attach charms to bracelets, clasps onto chain, etc.
TierraCast is a USA based company that specializes in quality pewter cast components for the jewelry making industry. The TierraCast product line provides affordable, quality components that compliment a wide range of jewelry and beadwork.
Round Open Jump Rings
20 Gauge (0.8mm)
ID (mm) 3.78 - ID (in) .149
OD (mm) 5.40 - OD (in) .213
Aspect Ratio (AR) 4.7
TierraCast Jump Rings are available in these sizes: