I've sanded floors for 25 years (oh dear!), but as a result, I include a page on tips to ensure you dont throw money down the drain by ripping up sheets when starting sanding.
10 x 60 Grit
I also sell ASSORTED oblong & round discs for the HT8 and HT7 Edger - Search HT7 Sheets Fast. etc
If you are unsure about your requirements, call me to discuss.
I'm in South Manchester, if you are too & need these urgently you can normally pickup from wherever I'm working seven days a week if you text me in advance. 0777 333 7386