GLM Plug. Made for use in bell housing for Alpha One Gen II Mercruiser. Refer to manufacturer recommendations for proper fit/installation information. Features of GLM 21893 Plug Made from quality materials For use with Mercruiser Pipe plug for Alpha One Gen II bell housing Refer to manufacturer recommendations for proper installation/fit information Designed for use in marine environments Package Contents: GLM 21893 Plug GLM 21893: Plug