diff --git a/README.md b/README.md
index 9d885d6..1652402 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ We have provided the API Documentation on the web. For more information, please
 - [x] Option Good code parser(No code, it matched by name)
 - [x] Receipt code parser
 - [x] Location code parser
-- [x] Box code parser
+- [x] SKU parser
 
 ## Install
 
@@ -213,15 +213,12 @@ print LocationCode::of(warehouse: 'AUK', rack: 'R3', shelf: 'S32'); //` Stringab
 //=> AUK-R3-S32
 ```
 
-### Box Code
+### SKU
 
 ```php
-print BoxCode::of(code: 123, prefix: 'PO');     //=> PO123
-print BoxCode::of([
-    'code' => 123, 'prefix' => 'PO'
-    ])->boxCode();                              //=> PO123
-print BoxCode::of(123)->boxCode();              //=> 123
-print BoxCode::of(123, prefix: 'PO');           //=> PO123
+print Sku::of(code: 123, prefix: 'PO');     //=> PO123
+print Sku::of(123);                         //=> 123
+print Sku::of(123, prefix: 'PO');           //=> PO123
 ```
 
 ## Formatting
diff --git a/src/BoxCode.php b/src/Sku.php
similarity index 57%
rename from src/BoxCode.php
rename to src/Sku.php
index 7018526..570a091 100644
--- a/src/BoxCode.php
+++ b/src/Sku.php
@@ -5,24 +5,24 @@
 use Stringable;
 
 /**
- * This class represents a box code identified by code and prefix. The box code is generated from these properties.
+ * This class represents a SKU identified by code and prefix. The SKU is generated from these properties.
  *
  * @author Samgu Lee <cable8mm@gmail.com>
  *
  * @since  2025-02-24
  */
-class BoxCode implements Stringable
+class Sku implements Stringable
 {
     /**
-     * Code representing the box
+     * Code representing the SKU
      *
      * @example BO123
      */
-    private string $boxCode;
+    private string $sku;
 
     private function __construct(
         /**
-         * Box code
+         * The code for the sku
          *
          * @example 123
          */
@@ -34,27 +34,26 @@ private function __construct(
          */
         private ?string $prefix = null
     ) {
-        $this->boxCode = $prefix.$code;
+        $this->sku = $prefix.$code;
     }
 
     /**
-     * Get the box code.
+     * Get the SKU.
      *
-     * @return string The method returns the box code
+     * @return string The method returns the SKU
      *
-     * @example print BoxCode::of(123, prefix: 'BO')->boxCode();    => 'BO123'
-     * @example print BoxCode::of(123, prefix: 'BO');               => 'BO123'
+     * @example print Sku::of(123, prefix: 'BO');    => 'BO123'
      */
-    public function boxCode(): string
+    public function sku(): string
     {
-        return $this->boxCode;
+        return $this->sku;
     }
 
     /**
-     * Create a new box code instance.
+     * Create a new SKU instance.
      *
-     * @param  string|int  $code  The box code
-     * @param  string|null  $prefix  Prefix for the box code
+     * @param  string|int  $code  The SKU
+     * @param  string|null  $prefix  Prefix for the SKU
      * @return self Provides fluent interface
      *
      * @throws \InvalidArgumentException
@@ -83,15 +82,15 @@ public static function of(
     }
 
     /**
-     * Get the string representation of the box code.
+     * Get the string representation of the SKU.
      *
-     * @return string The magic method returns the box code
+     * @return string The magic method returns the SKU
      *
-     * @example print BoxCode::of('1') => 'A1'
-     * @example print BoxCode::of('1', prefix: 'BO') => 'BO1'
+     * @example print Sku::of('1') => 'A1'
+     * @example print Sku::of('1', prefix: 'BO') => 'BO1'
      */
     public function __toString(): string
     {
-        return $this->boxCode;
+        return $this->sku;
     }
 }
diff --git a/tests/BoxCodeTest.php b/tests/BoxCodeTest.php
deleted file mode 100644
index 84294e4..0000000
--- a/tests/BoxCodeTest.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-namespace Cable8mm\GoodCode\Tests;
-
-use Cable8mm\GoodCode\BoxCode;
-use PHPUnit\Framework\TestCase;
-
-class BoxCodeTest extends TestCase
-{
-    public function test_full_box_code()
-    {
-        $this->assertEquals('PO123', BoxCode::of(
-            123,
-            prefix: 'PO'
-        )->boxCode());
-
-        $this->assertEquals('PO123', BoxCode::of([
-            'code' => 123,
-            'prefix' => 'PO',
-        ]));
-    }
-
-    public function test_box_code_without_prefix()
-    {
-        $this->assertEquals('123', BoxCode::of(
-            123
-        )->boxCode());
-
-        $this->assertEquals('123', BoxCode::of([
-            'code' => 123,
-        ]));
-    }
-
-    public function test_location_code_with_empty()
-    {
-        $this->expectException(\InvalidArgumentException::class);
-
-        BoxCode::of([
-            'wrong' => 'key',
-        ]);
-    }
-}
diff --git a/tests/SkuTest.php b/tests/SkuTest.php
new file mode 100644
index 0000000..28f94c7
--- /dev/null
+++ b/tests/SkuTest.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace Cable8mm\GoodCode\Tests;
+
+use Cable8mm\GoodCode\Sku;
+use PHPUnit\Framework\TestCase;
+
+class SkuTest extends TestCase
+{
+    public function test_full_sku()
+    {
+        $this->assertEquals('PO123', Sku::of([
+            'code' => 123,
+            'prefix' => 'PO',
+        ]));
+    }
+
+    public function test_sku_without_prefix()
+    {
+        $this->assertEquals('123', Sku::of([
+            'code' => 123,
+        ]));
+    }
+
+    public function test_sku_with_wrong_code()
+    {
+        $this->expectException(\InvalidArgumentException::class);
+
+        Sku::of([
+            'wrong' => 'key',
+        ]);
+    }
+}