... to corrsion, high hardness and durable4. Applicable for glass sliding door, folding door ,Using for 8/10mm glass 5. The design to ... days 2) We are the manufacture that special in producing sliding door ,swing door,moving gate,folding door ,glass hinge, ... Testing machine Test the using life of sliding door systems & max. weight of the sliding door rollerSalt spray test machineCorrosion resistant: check ...