الوصف

Hole size(L*W): **0x**0mm
           **5x**0mm
           **0x**8mm
           **9x**0mm
Material: Gavlnized steel Z**5,  with a thermal and acoustic *5mm fibreglass insulation and two quick-acting closures. 
The three small sizes are with strong steel wire safety chain.
Removable access panel door 
Installation: Mounted on the flat side of rectangular ducts for inspection and maintainence to the ducts
Packing: carton case + pallet