diff --git a/crystal_toolkit/renderables/migrationgraph.py b/crystal_toolkit/renderables/migrationgraph.py
index 8e3751e4..7b94d387 100644
--- a/crystal_toolkit/renderables/migrationgraph.py
+++ b/crystal_toolkit/renderables/migrationgraph.py
@@ -1,8 +1,7 @@
-from turtle import pos
-import numpy as np
-
 from pymatgen.analysis.diffusion.neb.full_path_mapper import MigrationGraph
-from crystal_toolkit.core.scene import Scene, Cylinders
+
+from crystal_toolkit.core.scene import Cylinders, Scene
+
 
 def get_migrationgraph_scene(
     self,
@@ -19,13 +18,19 @@ def get_migrationgraph_scene(
     result_scene = self.structure.get_scene()
     hop_contents = []
     for one_hop in self.unique_hops.values():
-        hop_cyl = Cylinders(positionPairs=[[list(one_hop["ipos_cart"]), list(one_hop["epos_cart"])]], radius=0.2, visible=True)
+        hop_cyl = Cylinders(
+            positionPairs=[[list(one_hop["ipos_cart"]), list(one_hop["epos_cart"])]],
+            radius=0.25,
+        )
         hop_contents.append(hop_cyl)
 
     result_scene.contents.append(
-        Scene(name="hops", origin=result_scene.contents[0].origin, contents=hop_contents)
+        Scene(
+            name="hops", origin=result_scene.contents[0].origin, contents=hop_contents
+        )
     )
     print(result_scene.contents[-1])
     return result_scene
 
-MigrationGraph.get_scene = get_migrationgraph_scene
\ No newline at end of file
+
+MigrationGraph.get_scene = get_migrationgraph_scene