|
|
|
|
|
|
|
|
|
|
INVISIBLE SCREW |
|
|
|
DESCRIPTION |
INVISIBLE SCREW
Specialized design with double thread. No worry to treading force. Without apply silicone. Roof without leaking. Color is changeable for each building, which is more beautiful and whose anti-corrosion is stronger. |
|
|
|
|
|
|
|
|