Compatible OPC drum haven't a metal gear. This gear should be remove from the original OPC drum with help a flat screwdriver and it uses in compatible OPC drum.
Also searched as:
Canon i-Sensys LBP 253X,LBP253, LBP253x, LBP253 x
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iSensys253, iSensys253x, iSensys253 x,
i-SensysLBP253, i-SensysLBP253x, i-SensysLBP253 x,
iSensysLBP253, iSensysLBP253x, iSensysLBP253 x