diff --git a/docs/resources/library/celltreat.md b/docs/resources/library/celltreat.md
index 192aa2ab3aa..16b3117ab17 100644
--- a/docs/resources/library/celltreat.md
+++ b/docs/resources/library/celltreat.md
@@ -8,3 +8,10 @@
 | Same as 229590 (229590 is sold with lids) 'CellTreat_96_wellplate_350ul_Ub'<br>Part no.: 229591<br>[manufacturer website](https://www.celltreat.com/product/229591/) | ![](img/celltreat/CellTreat_96_wellplate_350ul_Ub.jpg) | `CellTreat_96_wellplate_350ul_Ub`  |
 | 229195 and 229196 'CellTreat_96_wellplate_350ul_Fb'<br>Part no.: 229195<br>[manufacturer website](https://www.celltreat.com/product/229195/) <br>  are treated | ![](img/celltreat/CellTreat_96_wellplate_350ul_Fb.jpg) | `CellTreat_96_wellplate_350ul_Fb`  |
 | 229562 (not sterile), 229566 (sterile) 'CellTreat_12_troughplate_15000ul_Vb'<br>[manufacturer website](https://www.celltreat.com/product/229562) <br>  are treated | ![](img/celltreat/CellTreat_12_troughplate_15000ul_Vb.jpg) | `CellTreat_12_troughplate_15000ul_Vb`  |
+
+
+## Tubes
+
+| Description               | Image              | PLR definition |
+|--------------------|--------------------|--------------------|
+| 229414 (sterile) <br>[manufacturer website](https://www.celltreat.com/product/229414/) <br>- bottom_type=TubeBottomType.V | ![](img/celltreat/celltreat_15000ul_centrifuge_tube_Vb.webp) | `celltreat_15000ul_centrifuge_tube_Vb` |
diff --git a/docs/resources/library/eppendorf.md b/docs/resources/library/eppendorf.md
index b3b173a7732..f4cd9df0a8c 100644
--- a/docs/resources/library/eppendorf.md
+++ b/docs/resources/library/eppendorf.md
@@ -19,3 +19,4 @@ Company page: [Eppendorf Wikipedia](https://en.wikipedia.org/wiki/Eppendorf_(com
 | Description               | Image              | PLR definition |
 |--------------------|--------------------|--------------------|
 | "Common eppendorf tube"<br>Part no.: 022431021 (DNA), 022431081 (protein)<br>[manufacturer website](https://www.fishersci.com/shop/products/dna-lobind-microcentrifuge-tubes/13698791) | ![](img/eppendorf/Eppendorf_DNA_LoBind_1_5ml_Vb.webp) | `Eppendorf_DNA_LoBind_1_5ml_Vb` `Eppendorf_Protein_LoBind_1_5ml_Vb` |
+| "Common eppendorf tube"<br>Part no.: 022431048<br>[manufacturer website](https://www.fishersci.com/shop/products/dna-lobind-microcentrifuge-tubes/13698792) | ![](img/eppendorf/Eppendorf_DNA_LoBind_2ml_Ub.jpg) | `Eppendorf_DNA_LoBind_2ml_Ub`  |
diff --git a/docs/resources/library/img/celltreat/celltreat_15000ul_centrifuge_tube_Vb.webp b/docs/resources/library/img/celltreat/celltreat_15000ul_centrifuge_tube_Vb.webp
new file mode 100644
index 00000000000..1cefc4d60b4
Binary files /dev/null and b/docs/resources/library/img/celltreat/celltreat_15000ul_centrifuge_tube_Vb.webp differ
diff --git a/docs/resources/library/img/eppendorf/Eppendorf_DNA_LoBind_2ml_Ub.jpg b/docs/resources/library/img/eppendorf/Eppendorf_DNA_LoBind_2ml_Ub.jpg
new file mode 100644
index 00000000000..9e6034e06c5
Binary files /dev/null and b/docs/resources/library/img/eppendorf/Eppendorf_DNA_LoBind_2ml_Ub.jpg differ
diff --git a/pylabrobot/resources/celltreat/__init__.py b/pylabrobot/resources/celltreat/__init__.py
index 15ff2bd6e67..9848d77c78f 100644
--- a/pylabrobot/resources/celltreat/__init__.py
+++ b/pylabrobot/resources/celltreat/__init__.py
@@ -1 +1,2 @@
 from .plates import *
+from .tubes import *
diff --git a/pylabrobot/resources/celltreat/tubes.py b/pylabrobot/resources/celltreat/tubes.py
new file mode 100644
index 00000000000..af515375801
--- /dev/null
+++ b/pylabrobot/resources/celltreat/tubes.py
@@ -0,0 +1,19 @@
+from pylabrobot.resources.tube import Tube
+
+
+def celltreat_15000ul_centrifuge_tube_Vb(name: str) -> Tube:
+  """CELLTREAT® Centrifuge Tubes-RackMaster 15mL Centrifuge Tube, Best Value - Paperboard Rack, Sterile
+  Part no.: 229414
+
+  - bottom_type=TubeBottomType.V
+  """
+  diameter = 14.7  # measured
+  return Tube(
+    name=name,
+    size_x=diameter,
+    size_y=diameter,
+    size_z=190.5,  # measured
+    model=celltreat_15000ul_centrifuge_tube_Vb.__name__,
+    max_volume=15_000,  # units: ul
+    material_z_thickness=0.8,  # measured
+  )
diff --git a/pylabrobot/resources/eppendorf/tubes.py b/pylabrobot/resources/eppendorf/tubes.py
index 1cc78389101..839e8808c34 100644
--- a/pylabrobot/resources/eppendorf/tubes.py
+++ b/pylabrobot/resources/eppendorf/tubes.py
@@ -9,15 +9,15 @@ def Eppendorf_DNA_LoBind_1_5ml_Vb(name: str, model="Eppendorf_DNA_LoBind_1_5ml_V
   - bottom_type=TubeBottomType.V
   - snap-cap lid
   """
-  diameter = 10.33
+  diameter = 10.33  # measured
   return Tube(
     name=name,
     size_x=diameter,
     size_y=diameter,
-    size_z=39.5,
+    size_z=39.5,  # measured
     model="Eppendorf_DNA_LoBind_1_5ml_Vb",
     max_volume=1_400,
-    material_z_thickness=0.8,
+    material_z_thickness=0.8,  # measured
   )
 
 
@@ -29,3 +29,21 @@ def Eppendorf_Protein_LoBind_1_5ml_Vb(name: str) -> Tube:
   Same as Eppendorf_DNA_LoBind_1_5ml_Vb
   """
   return Eppendorf_DNA_LoBind_1_5ml_Vb(name=name, model="Eppendorf_Protein_LoBind_1_5ml_Vb")
+
+
+def Eppendorf_DNA_LoBind_2ml_Ub(name: str) -> Tube:
+  """2 mL round-bottom snap-cap Eppendorf tube. cat. no.: 022431048
+
+  - bottom_type=TubeBottomType.U
+  - snap-cap lid
+  """
+  diameter = 10.33  # measured
+  return Tube(
+    name=name,
+    size_x=diameter,
+    size_y=diameter,
+    size_z=41,  # measured
+    model="Eppendorf_DNA_LoBind_2ml_Ub",
+    max_volume=2000,  # units: ul
+    material_z_thickness=0.8,  # measured
+  )