Sac Assortment Packs ballpoint part you can use a buffer

you can use a buffer stick flat on the surrounding surface to clean the residual paint off that is beyond the diamond depression boundary

They changed to the smaller stem and thread size in the bushing with the aerometric 51

branded with the Big E

This will work on MB 149s with notches at 12 o'clock and 6 o'clock relative to the nib position as shown in the photos below

in the bottle

Sac Assortment Packs ballpoint part you can use a bufferWe offer straight Latex Sac Assortment packs in two amounts: 37 sacs + Diaphragms or 100 sacs. 37 Sac Assortment includes: Size 10 x 1 Size 12 x 2 Size 13 x 2 Size 14 x 2 Size 15 x 5 Size 16 x 5 Size 17 x 5 Size 18 x 5 Size 19 x 1 Size 20 x 5 Standard Vac Diaphragm x 2 Debutant Vac Diaphragm x 2 100 Sac Assortment includes: Size 14 x5 Size 15 x 10 Size 16 x15 Size 17 x 20 Size 18 x 20 Size 19 x 10 Size 20 x 10 Size 22 x 10 We sell a sac gage (D8 Tool)