diff --git a/RhSolutions.Api.Tests/ProductQueryModifierTests.cs b/RhSolutions.Api.Tests/ProductQueryModifierTests.cs
index 32bc140..0756d4f 100644
--- a/RhSolutions.Api.Tests/ProductQueryModifierTests.cs
+++ b/RhSolutions.Api.Tests/ProductQueryModifierTests.cs
@@ -6,35 +6,40 @@ namespace RhSolutions.Api.Tests;
 
 public class ProductQueryModifierTests
 {
-    private ProductQueryModifierFactory _factory;
+	private ProductQueryModifierFactory _factory;
 
-    [SetUp]
-    public void Setup()
-    {
-        _factory = new ProductQueryModifierFactory();
-    }
+	[SetUp]
+	public void Setup()
+	{
+		_factory = new ProductQueryModifierFactory();
+	}
 
-    [TestCase("Монтажная гильза", "Гильза 16", "Монтажная гильза 16")]
-    [TestCase("Монтажная гильза", "Пресс-втулка 20", "Монтажная гильза 20")]
-    public void SleeveTest(string productType, string query, string modified) =>
-        Test(productType, query, modified);
+	[TestCase("Монтажная гильза", "Гильза 16", "Монтажная гильза 16")]
+	[TestCase("Монтажная гильза", "Пресс-втулка 20", "Монтажная гильза 20")]
+	public void SleeveTest(string productType, string query, string modified) =>
+		Test(productType, query, modified);
 
-    [TestCase("Тройник RAUTITAN", "Тройник 20-16-16", "Тройник RAUTITAN -PLATINUM 20-16-16")]
-    [TestCase("Тройник RAUTITAN", "Тройник 20x16x16", "Тройник RAUTITAN -PLATINUM 20-16-16")]
-    public void TPieceTest(string productType, string query, string modified) =>
-        Test(productType, query, modified);
+	[TestCase("Тройник RAUTITAN", "Тройник 20-16-16", "Тройник RAUTITAN -PLATINUM 20-16-16")]
+	[TestCase("Тройник RAUTITAN", "Тройник 20x16x16", "Тройник RAUTITAN -PLATINUM 20-16-16")]
+	public void TPieceTest(string productType, string query, string modified) =>
+		Test(productType, query, modified);
+		
+	[TestCase("Муфта соединительная", "муфта 20", "Муфта соединительная равнопроходная 20")]
+	[TestCase("Муфта соединительная", "переходник 20-16", "Муфта соединительная переходная 20-16")]
+	public void CouplingTest(string productType, string query, string modified) =>
+		Test(productType, query, modified);
 
-    public void Test(string productType, string query, string modified)
-    {
-        Dictionary<string, StringValues> queryPair = new()
-        {
-            ["query"] = new StringValues(query)
-        };
-        QueryCollection collection = new(queryPair);
-        QueryString expected = new($"?query={Uri.EscapeDataString(modified)}");
-        var modifier = _factory.GetModifier(productType);
-        bool result = modifier.TryQueryModify(collection, out var actual);
-        Assert.True(result);
-        Assert.That(actual, Is.EqualTo(expected));
-    }
+	public void Test(string productType, string query, string modified)
+	{
+		Dictionary<string, StringValues> queryPair = new()
+		{
+			["query"] = new StringValues(query)
+		};
+		QueryCollection collection = new(queryPair);
+		QueryString expected = new($"?query={Uri.EscapeDataString(modified)}");
+		var modifier = _factory.GetModifier(productType);
+		bool result = modifier.TryQueryModify(collection, out var actual);
+		Assert.True(result);
+		Assert.That(actual, Is.EqualTo(expected));
+	}
 }
\ No newline at end of file
diff --git a/RhSolutions.Api/Services/CouplingModifier.cs b/RhSolutions.Api/Services/CouplingModifier.cs
new file mode 100644
index 0000000..7eca03c
--- /dev/null
+++ b/RhSolutions.Api/Services/CouplingModifier.cs
@@ -0,0 +1,39 @@
+
+using System.Text.RegularExpressions;
+using Microsoft.AspNetCore.Http.Extensions;
+
+namespace RhSolutions.Api.Services
+{
+    public class CouplingModifier : IProductQueryModifier
+	{
+		private string pattern { get; } = @"\b(16|20|25|32|40|50|63)\b";
+		public bool TryQueryModify(IQueryCollection collection, out QueryString queryString)
+		{
+			queryString = QueryString.Empty;
+			var query = collection["query"].ToString();
+			if (string.IsNullOrEmpty(query))
+			{
+				return false;
+			}
+			var matches = Regex.Matches(query, pattern);
+			if (matches.Count < 1)
+			{
+				return false;
+			}
+			else
+			{
+				QueryBuilder qb = new();
+				if (matches.Count < 2)
+				{
+					qb.Add("query", $"Муфта соединительная равнопроходная {matches[0]}");
+				}
+				else 
+				{
+					qb.Add("query", $"Муфта соединительная переходная {matches[0]}-{matches[1]}");
+				}
+				queryString = qb.ToQueryString();
+				return true;
+			}
+		}
+	}
+}
diff --git a/RhSolutions.Api/Services/ProductQueryModifierFactory.cs b/RhSolutions.Api/Services/ProductQueryModifierFactory.cs
index b6740b4..5801999 100644
--- a/RhSolutions.Api/Services/ProductQueryModifierFactory.cs
+++ b/RhSolutions.Api/Services/ProductQueryModifierFactory.cs
@@ -1,4 +1,4 @@
-namespace RhSolutions.Api.Services;
+namespace RhSolutions.Api.Services;
 
 public class ProductQueryModifierFactory
 {
@@ -10,6 +10,8 @@ public class ProductQueryModifierFactory
 				return new SleeveQueryModifier();
 			case "Тройник RAUTITAN":
 				return new TPieceQueryModifier();
+			case "Муфта соединительная":
+				return new CouplingModifier();
 			case "Flex":
 				return new FlexPipeQueryModifier();
 			case "Stabil":