The Welger 1712420128 Stop is an original equipment manufacturer (OEM) part designed for Welger RP series round balers. This crucial component ensures precise control and reliable operation within the baler mechanism, contributing to efficient and consistent bale formation. It is a direct replacement for the original stop on various Welger RP models, including RP200, RP200S, RP220, RP220S, RP235, RP245, RP250, RP435, RP445, RP500, RP520, RP535, RP545, RP550, and RP550S.