21mm to Butane Nut adaptor

For use with Butane cylinder with a 21mm clip-on outlet (normally Calor 7kg or Calor 15kg), in conjunction with Butane Pigtail hoses and a bulkhead regulator fitted inside your gas locker.

Normally, you can only use standard 4.5kg Butane cylinders with pigtails. However, this adaptor will allow you to use 7kg and/or 15kg butane cylinders which have a 21mm clip-on outlet.