All 4" Internal Width Channels (GRP) Home » Products » Trench Drains » Glass Reinforced Polyester (GRP) & Plastic Trench Drains » GRP Channels » 4" Internal Width Channels (GRP) T1400-PB 4″ Glass Reinforced Polyester (GRP) Trench Channel with No Edge Rail T1400-PB-13 4″ Glass Reinforced Polyester (GRP) Channel with Galvanized Steel Edge Rail T1400-PB-3 4″ Glass Reinforced Polyester (GRP) Channel with Stainless Steel Edge Rail T1460-PB 4″ Glass Reinforced Polyester (GRP) Shallow Channel
