diff --git a/BOM.md b/BOM.md
index 0a88d8d..7f21dfb 100644
--- a/BOM.md
+++ b/BOM.md
@@ -5,7 +5,7 @@
 |------|-----|--------------|-----------|----------------|
 | Steel ball | 12 | Ø1.25 mm (0.05") | Precision G10 or better. Can be sourced from small ball bearings | |
 | PU stretch cord | 1 m | Ø1mm | e.g. "Stretch Magic" or "Magic String" | |
-| Neodym Cylinder Magnet | 70 | Ø3mm h=4 mm |  | |
+| Neodym Cylinder Magnet | 70 | Ø3mm h=4 mm | N42 Grade | [Ebay Link](https://www.ebay.de/itm/365333642187?var=635110190027) |
 | Brass Pipe | 1 m | OD=Ø2mm ID=Ø1 mm |  | |
 | M2 Screw | 12 | M2×12 mm, Countersunk |  | |
 | M3 Grub Screw | 6 | M3×4 |  | |