RA330 secondary air tubes are currently on backorder from Rolled Alloy
Expected restock is June.
As of 1-21-22 I have one 6″ tube left in stock.
Cost is currently $ 85 plus shipping
After that piece has sold, I cannot restock until mid to late June.
At that time I expect a further price increase
All steel prices have sharply increased.
Unfortunately my steel made product prices will reflect that.
I am currently working out of state.
Replies and delivery times will be delayed
My secondary tubes and lite weight pop in doors will remain available, but with a longer wait time for manufacture.
I am not taking any orders for my Heavy batch doors at this time.
Fire clay is still readily available
Dragon Tech - A Rocket Mass Heater Store 