GZ-251s – Hose coupling, reducing – ø16 / ø12 – steel

GZ-250s – Hose coupling, reducing – ø16 / ø10 / steel

GZ-253As – Hose coupling, equal – ø19 – steel

GZ-355 – Hose coupling, reducing – Ø19 / Ø12 – Brass

GZ-230B – Straight coupling, reducing – Ø6 / Ø8

GZ-350s – Hose coupling, equal – ø10 – steel