Black overflow and fittings made by flowplast. Sockets much deeper and stronger than poly pipe and 1/3 of the price. Ask your merchant to order some from their supplier we bulk buy from a wholesaler "primaflow" I got some 32mm streets in van. Also flowplast will form bends and offsets on a 22mm bender
Didn't Osama make them? Or a scoket that went on outside of elbow ? Why u a need streets? Shouldn't bed bending and twisting conny that tightly? I like 45d Bends. But sure soma made some . And Marley ?