Rod and screen mica SSMP, SSEA TU 21-25-24-84
| Grade |
Length and width, mm, not above | Thickness, mm | Electric strength, kV/mm, not above | Sheet resistance, Om, not less than |
| SSMP – rod muscovite mica for electric soldering irons | not above 100 | 0,010 – 0,065 | 40 | 1*10*8 |
| SSEA – rod and screen muscovite mica for aviation spark plugs | not above 100 | 0,010 – 0,035 | 40 | 1*10*8 |
Mica plates are rectangular in a shape.