Part Number: 147493 (Ring, backing)Part Number: 544-8978-002 (Ring, backing)Part Number: 608407620 (Ring, backing)Part Number: 713022324 (Ring, backing)Part Number: F-166-824-525 (Ring, backing)Part Number: HTE6430-007 (Ring, backing)Part Number: SP905-27 (Ring, backing)Part Number: SPE3527 (Ring, backing)