304 Stainless Steel Magnetic Clasps, Column. Size: about 13.5mm wide, 21mm long, hole: 8mm. These 304 Stainless Steel beads with smooth appearance are special. They are well clean and never rust. And they are the best beads for multi-strand necklaces. And they are affordable. So buy this and Get 48% OFF 2 pcs 304 Stainless Steel Magnetic Clasps for $2.10 @PandaHall