we factory make pva roller for swimming pool pva roller robot.

The polyvinyl alcohol seamless foam roller(blue one) for Swimming Pool water removing, Size can be custom design.The Roller is guaranteed to work faster, better and last longer than any other unit on the market.

OD92mm(+2mm-2mm) ID48mm(+2mm,-1mm)length315mm(+10mm,-0mm)

pva roller can be make as your require sizes.

pva roller Physical Propertles:

a,30% Compressive Stress: 90-120 gm/ cm2   

b,Apparent Density: 0.12 gm/cc 

c,Tensile Strength: 4.7-5.6 kg/ cm

d,Tearing Strength: 1.9-2

e,Porosity: 89-92

f,pore size: 80-130microns

h,Water Absorption: 700-1050%(w/d)

g, Absorption Speed 3 9