diff --git a/u_ech.go b/u_ech.go
index e5ce83a9..9d3593c9 100644
--- a/u_ech.go
+++ b/u_ech.go
@@ -9,6 +9,7 @@ import (
 	"sync"
 
 	"github.com/cloudflare/circl/hpke"
+	"github.com/refraction-networking/utls/dicttls"
 )
 
 // Unstable API: This is a work in progress and may change in the future. Using
@@ -234,3 +235,19 @@ func (*UnimplementedECHExtension) MarshalClientHello(*UConn) error {
 func (*UnimplementedECHExtension) mustEmbedUnimplementedECHExtension() {
 	panic("mustEmbedUnimplementedECHExtension() is not implemented")
 }
+
+func BoringGREASEECH() *GREASEEncryptedClientHelloExtension {
+	return &GREASEEncryptedClientHelloExtension{
+		CandidateCipherSuites: []HPKESymmetricCipherSuite{
+			{
+				KdfId:  dicttls.HKDF_SHA256,
+				AeadId: dicttls.AEAD_AES_128_GCM,
+			},
+			{
+				KdfId:  dicttls.HKDF_SHA256,
+				AeadId: dicttls.AEAD_CHACHA20_POLY1305,
+			},
+		},
+		CandidatePayloadLens: []uint16{128, 160, 192, 224}, // +16: 144, 176, 208, 240
+	}
+}
diff --git a/u_parrots.go b/u_parrots.go
index 5d2b96c0..36d978ed 100644
--- a/u_parrots.go
+++ b/u_parrots.go
@@ -726,23 +726,7 @@ func utlsIdToSpec(id ClientHelloID) (ClientHelloSpec, error) {
 					CertCompressionBrotli,
 				}},
 				&ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}},
-				&GREASEEncryptedClientHelloExtension{
-					CandidateCipherSuites: []HPKESymmetricCipherSuite{
-						{
-							KdfId:  dicttls.HKDF_SHA256,
-							AeadId: dicttls.AEAD_AES_128_GCM,
-						},
-						{
-							KdfId:  dicttls.HKDF_SHA256,
-							AeadId: dicttls.AEAD_AES_256_GCM,
-						},
-						{
-							KdfId:  dicttls.HKDF_SHA256,
-							AeadId: dicttls.AEAD_CHACHA20_POLY1305,
-						},
-					},
-					CandidatePayloadLens: []uint16{128, 160}, // +16: 144, 176
-				},
+				BoringGREASEECH(),
 				&UtlsGREASEExtension{},
 			}),
 		}, nil
@@ -816,23 +800,7 @@ func utlsIdToSpec(id ClientHelloID) (ClientHelloSpec, error) {
 					CertCompressionBrotli,
 				}},
 				&ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}},
-				&GREASEEncryptedClientHelloExtension{
-					CandidateCipherSuites: []HPKESymmetricCipherSuite{
-						{
-							KdfId:  dicttls.HKDF_SHA256,
-							AeadId: dicttls.AEAD_AES_128_GCM,
-						},
-						{
-							KdfId:  dicttls.HKDF_SHA256,
-							AeadId: dicttls.AEAD_AES_256_GCM,
-						},
-						{
-							KdfId:  dicttls.HKDF_SHA256,
-							AeadId: dicttls.AEAD_CHACHA20_POLY1305,
-						},
-					},
-					CandidatePayloadLens: []uint16{128, 160}, // +16: 144, 176
-				},
+				BoringGREASEECH(),
 				&UtlsGREASEExtension{},
 			}),
 		}, nil