Here are the diameters of all o-rings in the cartridge:
4.47x1.78 1pc
15.6x1.78 2pcs
8.10x1.60 1pc
6.50x2.50 1pc
7.65x1.78 1pc
2.00x1.00 2pcs
all of them are NBR70 or at least I bough NBR70 hardness at local sealings shop.
Will keep you posted if the dropper works after the change.
Feb. 16, 2023, 4:14 a.m. - Kochobass
Here are the diameters of all o-rings in the cartridge: 4.47x1.78 1pc 15.6x1.78 2pcs 8.10x1.60 1pc 6.50x2.50 1pc 7.65x1.78 1pc 2.00x1.00 2pcs all of them are NBR70 or at least I bough NBR70 hardness at local sealings shop. Will keep you posted if the dropper works after the change.