15PCS/lot Black FKM Fluorine Rubber O-rings Seal CS1.8mm ID1.8/3.55/4/4.5/4.87/5/5.15/5.3/5.6*1.8mm ORing Seal Gasket Washer

15PCS/lot Black FKM Fluorine Rubber O-rings Seal CS1.8mm ID1.8/3.55/4/4.5/4.87/5/5.15/5.3/5.6*1.8mm ORing Seal Gasket Washer

Aliexpress UK