Product Name: Long Sweep Bend, Sunlight Resistant
Type: Long Sweep 90 Degree Bend
Standard: UL 651
Material: UPVC
Size Range: 1–4 Inch
Wall Thickness: SCH 40
Connection End: Bell End
Applications: Electrical Conduits, Communication Lines

Source: https://www.landee.cn/long-sweep-90-degree-bend-ul-651-upvc-1-4-inches-sch-40.html