Silicone hose 30,5 x 5mm. (per meter)
inside dimension: 30.5mm
material thickness: 5mm
outside diameter: 30.5+(2*5)= 40.5mm
The big advantage compared to the other hoses is that these silicone hoses remain flexible even after years and have a sound dampening effect, the resonance that pumps can produce are absorbed by the hose.