diff --git a/PCB/Upper heating board/readme.md b/PCB/Upper heating board/readme.md
index 2a33f9a..5d5c162 100644
--- a/PCB/Upper heating board/readme.md	
+++ b/PCB/Upper heating board/readme.md	
@@ -1,8 +1,8 @@
 # UH_007
 
-- 2 layer PCB
+- 1 layer PCB
 - One sided assembly
-- material FR4
+- material Aluminium
 - 1oz copper
 - 1.6 mm thick
 - Leadfree HAL