20 pieces: Thermador Part Number 00618112 (AP4570139)
Replaces 1999626, 617174, 618112, AH3478553, EA3478553, PS3478553
Measurements: 8.04 mm in diameter; 6.3 mm in depth
High quality, durable heat resistant rubber
Warranty- All parts sold by SupplyEdge come with a 1 year, no questions asked, no hassle warranty.