Garage Door Low Headroom Conversion Kit. The Clopay Garage Door Low Headroom Conversion Kit bay be required if you have less than 15 in. Of headroom in your garage (see More Info below for a PDF of our How to Measure guide). Easily converts your new track to accommodate your low headroom application. Detailed installation instructions and all necessary hardware included. Reduces headroom for standard and EZ set extension spring systems to 4 1/2 in. Reduces headroom for EZ-set torsion spring system to 9-1/2 in. Maximum garage door height. Works on 12 in. Thank you for shopping with us! For Electrical Items: These products are manufactured according to the specifications of the US Electrical Standards and codes. We assume no responsibility if the item malfunctions or causes an accident because you tried to use the product with foreign electrical standards. The use of these items with a converter or other voltage transforming device is at your own risk. Please Note: Products are designed and rated for use in the US using a 110-120 Volt power source. With or without a transformer, this product is not recommended for use outside the US.