it can be connect between DN25 flexible SS tube and DN20 flexible SS tube 1" side is flat end can get good seal

3/4" outer diameter ---1/2" inner diameter brass fitting ,

it can be connect between DN20 flexible stainless steel tube and DN16 flexible stainless steel tube

3/4" side is flat end can get good seal

1" outer diameter ---3/4" inner diameter brass fitting

it can be connect between DN25 flexible stainless steel tube and DN20 flexible stainless steel tube1" side is flat end can get good seal

1" male---3/4" female reducer fitting