Material: Copper MATERIAL: made of brass, with silver and gold plated, lightweight and durable, no fade, can use them for a long time. Two SIZE:0.79in*2Pcs, each size all has two colors with gold and silver plated. EASY TO USE: this spacer own is a Clasp - it opens the tube by pulling it apart, then closes it by sliding the button made it back together - each half come with number of chain rings, you can add bracelet or necklace on it. Flexible & Fun Design:the lock clasp can keep your layered necklace from getting tangled while wearing. suitable for making muti-strand necklaces,bracelets or other DIY jewelry crafts. Compared with the general 14k clasp, this necklace connector is a slide lock and is safer. We have assembled the loops and lobster clasps before you receive these flower design tube locks. It saves you a lot of time. Once your necklaces are attached, you can take all layered necklaces on and off at the same time by sliding the barrel in or out.