Vent Systems 4" to 5" Inch Duct Reducer Adapter Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic PVC Pipe 125 to 100 mm - Amazon.com
Small Parts - TPC-125/16-24 -TPC-125/16 Polycarbonate Tubing, 3/4" ID x 1" OD x 1/8" Wall, Clear Color 24" L: Industrial Plastic Tubing: Amazon.com: Industrial & Scientific
Polycarbonate Tubing, 1 3/4" ID x 2" OD x 1/8" Wall, Clear Color 36" L: Industrial Plastic Tubing: Amazon.com: Industrial & Scientific
Amazon.com: 1/8" Polyethylene Drip Irrigation Tubing 100' (.125" ID x .185" OD) : Patio, Lawn & Garden
Spears 401 Series PVC Pipe Fitting, Tee, Schedule 40, White, 1" x 1/2" Socket: Industrial Pipe Fittings: Amazon.com: Industrial & Scientific