Consists of eight rubber synthetic o-rings, one o-ring 0.094 in. W 0.625 in. Id, part number 530-411, two 0-rings, 0.094 in. W, 0.375 in. Id, part number 530-413, one 0-ring 0.094 in. W, 0.563 in. Id, part number 520-043/15, four o-rings 0.094 in. W 0.500 in. Id, part number 520-044/03