TECH SPRAY Radio Shack Brush Attachment (640-4335) Directions for Use Faxback Doc. # 31939 For use with most Radio shack threaded Valve aerosol solvent cleaning products. Align Brush Attachment with threads on valve of aerosol. Press down on attachment and rotate can to draw attachment toward aerosol. Tighten until attachment, when activated, causes the contents to be expelled. Warning: Do not over-tighten as aerosol or attachment can be damaged. (EB 4/15/96) (WL 2/28/96)