Ventilation Pipe Reducer Adapter Pipe Air Duct Adapter Pipe Connector compatible with Inline Ventilation System Thickening treatment, reasonable transition, suitable compatible with transitional connection in the pipe. Made of material, environmentally friendly, non- and hard. Easy installation, using duct tape or duct clamps to connect air duct adapter. Perfectly suited compatible with bathroom, kitchens, apartment, home, office, el HVAC system. Perfect to connect 110mm to 100mm duct system. colour:White Material:plastic size: φ110-100mm, upper diameter 98mm, lower diameter 114mm, height 97mm Package Contents: 1 x Pipe Adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.