Husqvarna 530057869, Poulan 530057869Poulan P3818AV, P4018AV, PP3516AVX, PP4218AV, PP4218AVHD, PP4218AVL, PP4218AVX, SM4218AV and SM4218AVXHeight: 3/16 ", Width: 3 1/4 ", Length: 3 "