"Copper protection treatment lasts as long as new.
Good compression resistance ""0 210 PCs/Pack5 210 PCs/Pack2 310 PCs/Pack""20*90 5 PCs/Pack25*90 5 PCs/Pack ""20 20 PCs/Pack5 210 PCs/Pack2 310 PCs/Pack ""20*90 10 PCs/Pack25*90 10 PCs/Pack2 * 90 5 PCs/Pack ""20 40 PCs/box5 25 PCs/box ""20*1/2 20 PCs/Pack25*1/2 15 PCs/Pack""20 10 PCs/Pack5 25 PCs/Pack2 35 PCs/Pack "