400pcs NBR Oring Seal Set 6.07*1.8*50pcs; 7.65*1.78*50pcs; 10.82*1.78*50pcs; 12.42*1.78*50pcs; 14*1.78*50pcs;  6.8*1.9*50pcs;     10.8*2.4*50pcs;     13.8*2.4*50pcs;