Check the listing for details. Insulating Retractable Stair Trap - Mottez B509S. Condition: New. Listed at 108.94 USD. Our MOTTEZ retractable staircase hatch insulation will allow you to perfectly insulate any type of retractable staircase! Made from 8mm thick aluminized insulating foam. Energy saving, stair hatches being a significant source of heat loss! Universal dimension for 1300x700mm maximum insulating 5 thicknesses composed of 2 bubble films (Diam 10mm) thermolied waterproof air between 3 reflective aluminum sheets. Classification M1. Closing and opening by "zipper" is fixed inside the attic. Insulation coefficient: 1.77m² k/w, the equivalent of a 60mm glass wool layer (Remember to communicate a laptop number to us to receive an SMS confirmation of the availability of your bike carrier in the selected tnt relay) To do this, just go to the tnt site: https: // www. tnt .FR And to tell us about th.