6 x 3 8 40 July 8, 2019 16 32 64 128 6 x mũ 3 - 8 = 40 6 nhân x mũ 3 8 40 6 40 x 3 8 screw 6 3/4 x 8 6 x 38 6 ×8 6 3/8 x 3