"1. rubber sealants - round section rings made of vulcanized non-solid non-porous rubber: 14.50 x 2.50 fkm 75 black -2500pcs, 15.50 x3 nbr 70 black -20000pcs, 20.50 x 2.50 nbr 70 black -20000pcs, 21 , 50 x2 nbr 70 black -400 pcs, 22.50 x 3 nbr 70 black-2500 pc, 39 x 4.60 nbr 70 black-13580 pc, 39 x