I've always used a strip of black electrical tape. It'll work with either
mechanical or optical sensors.
Steve Robertson <steverob(a)hotoffice.com>
> From: "Stephanie Ring"
> sring(a)uslink.net
>
>
> I would like to know what material can
> be substituted for the black slide on
> 3.5 floppies when these are missing,
> on the right hand top corner.