Promark Milt Jackson PMJ Vibraphone Mallet PMJ mallets are a medium core with a yarn wrap on a rattan shaft Length: 11 1/2" PMJ mallets are recommended great for combo or solo work and are also great for a big bass marimba mallet Soft core, medium core with a yarn wrapped head on a short, rattan shaft All Promark drumsticks are designed and manufactured in the USA