Currently most of the options are 0.6mm diameter or smaller. I would like to see 0.7mm and 0.8mm choices, such as
0.7x12x30
0.7x12x40
0.7x12x50
0.8x12x30
0.8x12x40
0.8x12x50
It may help to have some in the 13mm or larger spring roll diameter such as
0.8x13x30
0.8x13x40