Simple machine, easy to operate,
Low investment even for 1000 Ltrs to 40,000 Ltrs  tanks,
 Most proffered machine  even today especially to produce higher size tanks from 5000 to 40,000 Ltrs capa.
 Easily operator of RNR  are available  at low cost.
Low production cost , most suitable   for large size  hollow  products/ containers.