Preinsulated joint sleeves – Plamen
HVAC Products Manson Insulation
Cantex® 4 PVC Conduit Coupling Sch 40
CANTEX 5144021 3-IN PVC EXPANSION CPLG
RS PRO Flexible, Split Conduit, 16mm Nominal Diameter, Plastic, Black
Cantex 1-1/4 in. PVC Conduit Coupling R6141626 - The Home Depot
PVC Electrical Products
HVAC Products Manson Insulation
Cantex 6141626 Coupling, 1-1/4 in Conduit, PVC: Conduit Fittings