4mm ID Inside

Silver Plated Zinc Based Alloy(Lead & Nickel Safe)  Silver Plated Steel for extra strength 1-1.2mm thick 6mm outside 3.6mm inside Soldered Closed 400 per package

6mm outside 4mm inside. Pre Opened straight cut for a easy pinch together. 400 Strong Jump Rings, 18 Gauge. Plated Brass 1mm thick 6mm outside 4mm inside Slightly Pre Opened 400 per package

6mm outside 4mm inside. Pre Opened straight cut for a easy pinch together. 400 Strong Jump Rings, 18 Gauge. Plated Brass 1mm thick 6mm outside 4mm inside Slightly Pre Opened 400 per package

100 Jump Rings, Brass, 5.5mm Round, 20 Gauge Open Jewelry Connectors Chain Links Sold Per Pkg of 100Brass5.5mm Round 20 GaugeOpen jump rings not soldered100 per package

Steel Nickel Tone Plated Steel for extra strength, 5.5mm outside 4.2mm inside. Pre Opened straight cut for a easy pinch together. Steel Nickel Tone Plated Steel for extra strength 1mm thick 5.5mm outside 4.2mm inside Pre Opend 400 per package

6mm outside 4mm inside. Pre Opened straight cut for a easy pinch together. 400 Strong Jump Rings, 18 Gauge.Antiqued Brass Plated1mm thick6mm outside 4mm insideSlightly Pre Opened400 per package

Works with most Antiqued Gold or Brass pieces. Plated Steel for extra strength 1mm thick, 5.5mm outside 4mm inside. Pre Opened straight cut for a easy pinch together. 400 Strong Jump Rings, Silver-plated Steel, 5.5mm Round, 21 Gauge. Pre Opened 4mm...

Silver Plated Steel for extra strength 1mm thick, 5mm outside 4mm inside. Pre Opened straight cut for a easy pinch together. 400 Strong Jump Rings, 18 Gauge. Silver Plated Steel for extra strength 1mm thick 6mm outside 4mm inside Slightly Pre Opened...