Features: Chrome plated brass material, durable and reliable. Exquisite mirror surface treatment, smooth and great hand feeling. Electroplating processing, shiny, bright and beautiful appearance. With slotted drives + lace design, it is easy to tighten with a coin or your hand. Fit for PC water cooling system. Specifications: Name: water cooling plug Thread specification: G1/4 (2 minutes), the actual outer diameter is 12.9MM Material: Brass Surface treatment: chrome plating Seal: seal with silicone Size: straight through 18MM Application: PC water cooling system Package weight: 55g Quantity: 5pcs Package List: 5 x Plug Note: Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.