Perforated cable tray - different materials and side wall types perforated cable tray has a similar structure with the cable trunking. There are a series of holes on the bottom and side walls. It has different hole patterns, such as oval, slot, round and other types. The holes make the perforated cable tray a good air circulation and heat dispersion. Perforated cable tray has different types according to different side walls. The main side walls can be r type inside flange, r type outside flange, c type inside flange, c type outside flange and p type. The various types can let the perforated cable tray suit more applications and supply more choice for the customers. A stainless steel inside flange r type perforated cable tray on the white background.Dpct-01: inside flange r type.a stainless steel outside flange r type perforated cable tray on the white background.Dpct-02: outside flange r type.A stainless steel inside flange c type perforated cable tray on the white background.Dpct-03: inside flange c type.a stainless steel outside flange c type perforated cable tray on the white background.Dpct-04: inside flange c type.A stainless steel p type perforated cable tray on the white background.Dpct-05: p type.