Looking at the parts breakdown for the Star 50SCE Roller Grill here:
http://download.partstown.com/is-bin/intershop.static/WFS/Reedy-PartsTown-Site/-/en_US/manuals/STA-50C_pm.pdfÂ
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And the Star 50SCE Roller Grill manual is here: http://download.partstown.com/is-bin/intershop.static/WFS/Reedy-PartsTown-Site/-/en_US/manuals/STA-20C_spm.pdfÂ
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According to the parts diagram, the top roller (tube) guides on both sides have three pieces:
1: The tube guide–same as the other 21Â Star 2P-Z2174 TUBE GUIDE AS EACH | Parts TownÂ
2: You also need Star 2I-Z2175 O-RING.06×1.13U/MEACH | Parts TownÂ
3A: And finally, for models after Star 50SCE Roller Grill serial no. C5003478, you need Star 2I-Z13659 INNER SEAL-BLACK – FRONT | Parts TownÂ
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3B: For anyone else who may have this issue in the future, if your model no. is before C5003477, you would need the first two pieces and this one: Star 2P-Z6455 TUBE SEAL SOLID-WHITE | Parts Town http://www.partstown.com/star/sta2p-z6455;sid=6H-behFKZUibekkyBciodLmKHKPbfuWWqHs=
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I hope this information is useful!Â
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-John