Metal And Plastic Plenum Boxes Home / Air Conditioning / Ducting Supplies / Metal And Plastic Plenum Boxes / Metal 450mm Plenum Box 250mm Top Entry Spigot with Spot Welded and Primed Seam Joints Metal 450mm Plenum Box 250mm Top Entry Spigot with Spot Welded and Primed Seam Joints Metal 450mm Plenum Box 250mm Top Entry Spigot with Spot Welded and Primed Seam Joints £51.45 £42.88 (ex. VAT) Stock Status: In Stock Information Reviews A range of metal plenum boxes for ductwork connection to grilles. 450mm x 450mm Metal Plenum Box with 250mm top Entry Spigot. The Side Entry Steel Plenum is made from plated steel with spot welded and primed seam joints. 450mm Square with 250mm spigot Not yet reviewed Write an online review and share your thoughts with other shoppers! Be the first to review this product Related Products 50mm Wide 45 Meter Roll Of Aluminium Foil Duct Tape £11.84 £9.87 (ex. VAT) Ceiling Diffuser 4 Way Blow Without Damper White Finish Diameters 150mm to 600mm £35.63 £29.69 (ex. VAT) Tecseal 100FR High Quality Solvented Duct Sealant 380cc Cartridge Tube £30.20 £25.17 (ex. VAT) Female Coupling For Circular Spiral Ducting 80mm To 630mm £7.29 £6.08 (ex. VAT) Male Coupling For Circular Spiral Ducting 80mm To 1250mm £3.24 £2.70 (ex. VAT) 100 Tough High Quality Duct / Cable Ties NT-33 For Flexible And Spiral Ducting Max Diameter 250mm £48.80 £40.67 (ex. VAT) Single Deflection Grille Without Damper White Finish 100mm to 600mm £22.51 £18.76 (ex. VAT)