[900PCS EARRING PIN STUDS]: Earring making kit comes with total 900pcs earring posts and backs, including 300pcs flat round earring posts (3 sizes, 100pcs each size), 300pcs stainless steel earring backs, 300pcs plastic earring backs. Large amount of earring pin studs can meet your various requirements, great choice for diy enthusiasts and those who want to repair your favorite earrings or other jewelry pieces.[4MM 5MM 6MM FLAT PAD EARRING STUDS]: Earrings posts with 4mm 5mm 6mm flat round blank designs, convenient to stick gems, rhinestones or small pattern accessories using liquid glue, allowing you to create your own unique and beautiful earrings, suitable for daily wear, parties, weddings, decorations, artworks and other occasions.[SIZE AND CONTENT]: 300Pcs flat pad earring studs are available in 3 sizes, 100pcs each size: 12mm(0.47in) long, 4mm(0.16in) / 5mm(0.20in) / 6mm(0.24in) wide, pin: 0.7mm / 0.6mm; 304 stainless steel earring backs * 300pcs: 6x4.5x3mm(0.24x0.18x0.12in), hole: 0.8mm; plastic earring backs: 6x5x4mm(0.24x0.20x0.16in), hole: 0.5mm. Come with plastic box * 1pc.[HIGH QUALITY MATERIAL]: The earring pin studs are made of 304 stainless steel, hypoallergenic, won't change color or rust easily and take long-term use. The bullet earring backs are made of plastic, lightweight and comfortable to wear.[CREATIVE GIFTS]: Presenting earring pin studs set as a gift to your friends and family, providing them with a therapeutic and enjoyable way to relax, experiment with designs, and wear your handmade creations proudly. Earring posts and backs kit is not just a gift, more than a canvas for creativity.