diff --git a/1.-Introduction.md b/1.-Introduction.md
index e0b4ceb..4480d07 100644
--- a/1.-Introduction.md
+++ b/1.-Introduction.md
@@ -8,6 +8,7 @@ By the end, you'll know the various tools required, and what components are nece
 These are the tools you'll need to build the Ploopy Mouse. You won't need them all immediately. This is just so you know what you're getting in for.
 
 - 2.5mm Allen key or screwdriver
+- #1 Phillips head screwdriver
 - A soldering iron
 - Solder
 
@@ -69,11 +70,11 @@ Yup, you guessed it, **we sell complete components kits**. See [[Step 2 of Appen
 - 2x M3x12mm flat-countersunk machine screws
 - 4x M3x6mm socket cap machine screws
 - 6x heat-set threaded inserts
-- 3x roller bearings
-- 2x metal dowels
+- 3x MR63ZZ roller bearings
+- 2x 3mm x 18mm metal dowels
 - 1x silicone ring
 - 4x friction pads
-- 1x snooker ball
+- 1x 1.75" snooker ball
 
 No surprise, **we sell kits of these**. See [[Appendix D: Hardware]] for how to buy them from us (or how to get them yourself, if you want.)