Led spacer

please someone give me a ref on digikey for little white led spacer??? don’t know i standard leds are T1 T2 T3 so idont know how to choose them…thanks

in reading the forum i have found this link
it seems it’s for 5mm led??? When you say 3 or 5 mm leds it reffer to the diameter or the heigt??
diameter i think… And i think leds supplied withe the kit are 3 mm are all this exact??? many thanks

The last part I ordered was this: http://fr.farnell.com/jsp/search/productdetail.jsp?sku=9555234

The part for 5mm worked fine too.

3mm LEDs are T1.