diff --git a/nhf/touhou/houjuu_nue/joints.py b/nhf/touhou/houjuu_nue/joints.py
index 5a79461..df67ece 100644
--- a/nhf/touhou/houjuu_nue/joints.py
+++ b/nhf/touhou/houjuu_nue/joints.py
@@ -16,14 +16,13 @@ TOL = 1e-6
 
 # uxcell 2 Pcs Star Knobs Grips M12 x 30mm Male Thread Steel Zinc Stud Replacement PP
 HS_JOINT_KNOB = ThreaddedKnob(
-    mass=0.0, # FIXME: Measure
+    mass=77.3,
     diam_thread=12.0,
     height_thread=30.0,
     diam_knob=50.0,
-    # FIXME: Undetermined
-    diam_neck=30.0,
-    height_neck=10.0,
-    height_knob=10.0,
+    diam_neck=25.0,
+    height_neck=12.5,
+    height_knob=15.0,
 )
 # Tom's world 8Pcs M12-1.75 Hex Nut Assortment Set Stainless Steel 304(18-8)
 # Metric Hexagon Nut for Bolts, Bright Finish, Full Thread (M12)