diff --git a/README.md b/README.md
index 2564c2c..a1c6dd7 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ X-X
 XXX 
 
 X is Plastic Sheets (from homedecor/pipeworks), - is nothing
+(It's a ring of plastic sheets like is done with wood for chests, if the above diagram is mangled)
 
 -Colored Plastic Boxes-