Internal helium spread and cluster mass relationships. Top: the internal helium spreads and the clusters present-day masses diagram, δY − log( M/M_⊙). Red pentagrams are LMC clusters. Small grey dots are Milky Way GCs. Dark/light grey circles are SMC clusters. Bottom: the correlation between the internal helium spreads and the clusters initial masses, for Milky Way GCs, LMC and SMC clusters. The arrow indicates that we consider this value to represent only an upper limit. The arrow indicates that we consider this value to represent only an upper limit.