1. Material: stainless steel + copper 2. Scope of application: room door, invisible door, etc 3. Adjustable design: adjust the distance between the bead and the door frame; adjust the strength of the bead spring 4. Multi-layer plating structure process, wet environment is not easy to corrode, long service life 5. Threaded process, adjustable length 6. Screws are used to install the bead, which is strong and solid after installation 7. The whole is made of stainless steel with higher hardness and durability 8. Hole distance: 40mm
