USB Necklace v5 (Long, 128GB, USB 3.0, MA) from Parts of Four. The USB series are fully functional USB 3.0 keys. MA:MATTE STERLING SILVER. Sanded at 320 grit Dimensions: Pendant size (WxHxD): 17 mm × 111 mm × 8 mm Chain length: 740 mm Weight: 102 grams Composition: Matte sterling silver + USB chip Made in Bali SKU: 1711-1-MA