White Cap | DURA 4-13/32 x 8 x 6" Spigot x Slip White PVC Reducer Bushing 2/BX
Order 6" x 4" PVC DUCT AirTech Concentric Reducer Coupling S x S (1006 04S 060040-IPS)
AZITICY PVC Reducer Connector Reducer 150 mm to 100 mm for Ventilation Round Pipe Ventilation Ventilation Duct Pipe System (150 mm to 100 mm) : Amazon.co.uk: DIY & Tools
6 x 4 SCH40 PVC REDUCER BUSHING (SP x FPT)
Pipekit Ltd Specialist independent distributor
64PR :: 6" to 4" PVC Conduit Reducer :: PLATT ELECTRIC SUPPLY
Mueller Ind. 1WKV5 | Pipe Reducer Or Increaser Pvc 6 x 4 In | Raptor Supplies United Kingdom