Large piping nozzles can be reused.They can be used with disposable piping bags,and you can also use them with Tumtanm couplers. 1E#1B# 1C#Piping Nozzles is 30MM,1M# 2D# Piping Nozzles is 25MM. 5pcs Extra large piping Nozzle,you can easy to find the tip what you want.