diff --git a/src/sdf_toolkit/parser/sdf.lark b/src/sdf_toolkit/parser/sdf.lark
index 6b87e08..90d5db5 100644
--- a/src/sdf_toolkit/parser/sdf.lark
+++ b/src/sdf_toolkit/parser/sdf.lark
@@ -115,6 +115,7 @@ port_spec: STRING
 // Real value (single or triple)
 rvalue: FLOAT
       | "(" [real_triple] ")"
+      | "(" FLOAT ")"
 
 real_triple: [FLOAT] ":" [FLOAT] ":" [FLOAT]
 
@@ -181,3 +182,5 @@ STRING: /[a-zA-Z0-9_\/.\[\]\\$]+/
 %ignore WS
 COMMENT: /\/\/[^\n]*/
 %ignore COMMENT
+BLOCK_COMMENT: /\/\*[\s\S]*?\*\//
+%ignore BLOCK_COMMENT
diff --git a/src/sdf_toolkit/parser/transformers.py b/src/sdf_toolkit/parser/transformers.py
index 3cc738b..760d4f5 100644
--- a/src/sdf_toolkit/parser/transformers.py
+++ b/src/sdf_toolkit/parser/transformers.py
@@ -147,9 +147,10 @@ def rvalue(self, *args: float | Values | Token | None) -> Values:
             if isinstance(arg, Values):
                 return arg
             if isinstance(arg, float):
-                return Values(min=None, avg=arg, max=None)
+                return Values(min=arg, avg=arg, max=arg)
             if isinstance(arg, Token) and arg.type == "FLOAT":
-                return Values(min=None, avg=float(arg), max=None)
+                value = float(arg)
+                return Values(min=value, avg=value, max=value)
         return Values()
 
     @v_args(inline=True)