Smeg SA20XMF 7 Position Oven Selector Function Switch - Part # 811730203Smeg 7 Position Oven Selector Switch. Genuine Part No. 811730203. OVE part no. 4073 20. 7 position oven select switch used in some late model underbench ovens. 6mm D Shaped shaft. 8 cam banks, 8 SPST switches in four groups. Front three banks are linked. Next 4 banks are linked. Last bank is on it's own. Shaft length 23mm. Contacts rated 16Amp. Fits models EKW999, S20XMF, S20XMFR, S890MF, S890MFA, S890MFEB, S890MFP, SA20XMF, SE20XMFR, SP20XMF, S890MF