... product Chear bumper, PU bumper, self adhesive bumper ,we have three different material as the following:1:HPB Series: ... the surface and hardly losing stickiness, but PVC bumper does. For the surface of low(high) ... injection technics, it has become the substitute of HPB series and have all the advantages of HEB ... stronger than HPB, but it couldn’t reach HPB Standard if using a piece of bumper. It has ...