5mm thick seal spacer. This is a 40mm x 40mm x 5mm thick type. You can separate and use them one by one. For renovations and various unevenness adjustments. It's a seal type, so you can stick it by peeling off the backing paper. Easy to use. Sold in sets of 4 sets x 20 pieces. Use one sheet when using 5mm metal fittings for exterior walls and siding. If using 15mm metal fittings, stack three sheets. Although there is no problem with the product itself, there may be scratches or slight tears on the packaging. We do not accept purchases from those who are overly concerned about this. Feel free to ask questions! No returns or exchanges. Nichiha Fittings NICHIHA KMEW Kemeu Siding Renovation DIY Sealing Caulking Exterior Wall Construction Materials Spacer 5mm Nail Screw Roll Nail Waterproof joto Piece Type Spacer Construction Materials Building Materials Construction Fittings Construction Hardware Nichiha