①. Designed for durability, the E14 screw fitting lamp holder is suitable for aging tests and other demanding applications. Its round shape and sturdy build ensure a secure fit for E14 bulbs, making it an essential tool for both home and industrial lighting projects. This lamp holder offers a practical and efficient solution for all your lighting needs. ②. Features ③. -Color:Black ④. -Material:Plastic, metal ⑤. -Size:4.00X4.00X2.80cm/1.57X1.57X1.10in ⑥. -Crafted from durable materials to ensure long-term use and resistance to damage ⑦. -Compatible with e14 screw base bulbs, suitable for various lighting fixtures and environments ⑧. -Easy to use design for quick and straightforward installation and bulb replacement ⑨. -Rigorously tested for aging to ensure stable and useful product ⑩. -Round design that offers a pleasing appearance and practical functionality ⑪. Package list: 12 x Bulb Holder Socket Base