Made of?Manganese Steel and plastic this light tube holder is lightweight, the plastic part can prevent bulbs from scratching, the steel part is sturdy and durable which can serve you for quite a long time. Widely used for all kind of T8 tube light except integrated tube light, both indoor and outdoor area. Feature - Color: Silver- Material: Manganese steel- Size: 3.2x2.2x0.75cm- 100pcs U shape Clips for T8 tube light- Manganese steel material, With Plastic finish to protect the tube, no scratch- Made of manganese steel and plastic this light tube holder is lightweight, sturdy and durable, and can used for quite a long time.- Easy to install without sagging, tiny and convenient for holding bulbs without extra wires and punch instead of traditional fussy steps- Widely used for all kind of T8 tube light except integrated tube light, both indoor and outdoor area.- Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!Packing list: 100 x U Clips Holder