90mm diameter
for glass and smooth surfaces
Material: aluminium ball

We have chosen  one of the best material for this product.
Butyl rubber ( IIR) is the copolymer of isobutylene and a small amount of isoprene.
Unlike TPU, PVC, silicone rubber, it has excellent impermeability, air retention and good flex properties.
UV resistance is also what we care when choosing this material.
All these features are important keys for stability while using suction cup in car.