SleeveLabelRail — JLF-81

Write a straight identifier on an empty envelope or clear sleeve header. Long registration fence and a writing window keep the marker away from the nearby image area. MEASURE FIRST Writing window 120×12 mm; straight header band at least 18 mm tall. IN THE BOX 1 printed part in matte black PLA: label-guide. Additional items required: Suitable marker and sleeve/envelope, not included. No additional fasteners required. Subjects, camera, lights and accessories are not included. Printed and shipped on demand by Slant 3D. Shipping and taxes are calculated at checkout. USE Turn the guide over so its raised fence registers against an empty sleeve or envelope edge. Write through the window with a suitable archival marker. Do not put the guide against exposed film. Dry indoor use. Keep away from heat; inspect and smooth any rough print edges before use. CAD geometry and local slicing checked. Physical fit, finish, stability and durability have not been tested. Images are renders of the actual CAD. Design: João Lutz / JoaoLutzFilm, developed with AI assistance. Original CAD; no third-party mesh used.