HERE IS A SERIOUSLY GREAT PRODUCT WE MAKE THESE TO ORDER THIS SIZE IS 450 MM SQARE VENTILLATION KIT THAT WELDS INTO THE SIDE PANELS OF YOUR CONTAINER. IF YOU USE CONTAINERS FOR PLANT STORAGE POWER SUPPLIES OR GENERATOR PRODUCTS AN ABSOLUTE MUST. USED IN PAINT WORKSHOPS AND CONVERTED CONTAINER WORKSHOPS THIS HELPS TO STOP HUGE CONDENSATION FROM HAPPENING.

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