About this 3D model

VIDEO: https://youtu.be/-Xm_2eCSqRA ALL FILES HERE: https://www.redpah.com/product/4044 Rotatable connector.Possibility to close access to the outside.For standard vacuum cleaner tube (ext 40mm, int 32mm).Use fan 60x60x25mm.The curve is divided into two parts with joint that fit together and must be glued (use a specific glue for plastic).