Specification: Product Name: Earring Hook Earring Hook And Open Jump Ring Material: Pure Copper Ear Safety Back Material: Rubber Process: Electroplating Earring Hook Size: 19 X 18mm/0.75 X 0.71in (Middle Bead Diameter 3.5mm/0.14in) Open Jump Ring Diameter: 7mm/0.27in Diameter Earring Safety Back Size: 4 X 4mm/0.16 X 0.16in Color: Silver, Gold Application: Handmade Diy Making Earrings, Bracelets, Necklaces, Anklets, Etc. Note: 1. Please Allow 1-3cm Measuring Deviation Due To Manual Measurement. 2. Due To The Different Monitor And Light Effect, The Actual Color Of The Item Might Be Slightly Different From The Color Showed On The Pictures. Thank You! Package Including: 50x Gold Earring Hooks 50x Silver Earring Hooks 50x Gold Open Jump Rings 50x Silver Open Jump Rings 100x Earring Safety Backs Hypoallergenic & Durable:The Earring Hooks And Open Jump Rings Are Made Of Pure Brass, Nickel And Lead Free, Will Not Cause Allergic Reactions And Fade, Have Shiny Surface, Safe And Durable. The Rubber Ear Plugs Can Hold The Earrings Firmly. Size Information:Earring Hooks Measure 19 X 18mm/0.75 X 0.71in (Middle Bead Diameter 3.5mm/0.14in), Open Jump Rings Diameter Is 7mm/0.27in, Earring Safety Backs Measure 4 X 4mm/0.16 X 0.16 In. Package Content:You Will Get 50pcs Gold Earring Hooks, 50pcs Silver Earring Hooks, 50pcs Gold Open Jump Rings, 50pcs Silver Open Jump Rings, 100pcs Earring Safety Backs. Sufficient Quantity Can Meet All Your Needs. Easy To Use:Earring Hooks Come With An Open Eyelet So You Can Easily Attach Your Jump Ring, Chain Or Pendant. Once Finished, Simply Use Pliers To Close The Eyelet Opening. Wide Application:This Earrings Making Supplies Kit Includes The Basic Supplies You Need For Diy Earrings, Bracelets, Necklaces, Anklets, Etc. You Can Add Any Other Embellishments Use Them To Make Your Own Special Earrings Or Restore Old Ones!