Professional manufacturing, made of nylon, it is very safe to use. Fine workmanship, practicality. It is excellent for securing and holding PCB or other electronic switching devices. This is a very good DIN rail mounting adapter, which can meet your needs very well. Features -Color:Green -Material:Nylon -Size:4.30X1.90X0.90cm/1.69X0.75X0.35in -This PCB holder is made of nylon, which is sturdy and tough, not easy to break or deform, can be used for a long time. -These din rail mounting adapters provide convenience in mounting circuit board or other electronic switching devices onto din rail. -Sturdy and compact, convenient to carry and store without occupying much space, allowing you to take them where you want it. -Holding your PCB or other devices steadily, not easy to come off. Can be given as a present to your DIY lover family and friend. -You will obtain large quantity of DIN rail mounting adapters, which can satisfy your DIY electrical using and replacing needs. Package list: 20 x Mounting Brackets screws