Neoprene rubber was developed by DuPont in the 1930s to meet the demand for an elastomer sheet with chemical resistance and outdoor capabilities. Though other types of synthetic rubber may have stronger resistance to some of these conditions, no other material offers the diverse cumulation of resistance that rubber neoprene does. This thick neoprene is the ideal industrial rubber sheeting. Rubber neoprene performs well in high-stress applications—particularly in outdoor and industrial conditions—that could damage other synthetic rubber types.
The DC100048 has a fixed spring tension size 4. Closer Door Sz4 Com Duro.It is a heavy-duty aluminum commercial door closer that complies with ANSI A156.