Backing Flange, For Use With Grainger Item Number 18E810, 1AUY3, 1AUY4, 1AUY5, 1AUY6, 1AUY7, 1AUY8, 1AUZ7, 24T857, 24T869, 2AEU2, 2EKR3, 2EKR4, 2EKR5, 2EKR6, 2VDJ4, 30RV88, 32ZU33, 32ZU34, 38A912, 38A914, 38A916, 3WY80, 4YDZ6, 5TB83, 5TB84, 5TB85, 5TB86