23" Jacket Zipper, YKK #5 Aluminum Metal ~ Medium Weight ~ Separating YKK Color 512 Lite Pink (1 Zipper/pack) YKK aluminum zippers are made from the highest quality metal. Thoroughly tested to ensure strength & reliability. Aluminum Teeth. 23" Jacket Zipper, YKK #5 Aluminum Metal ~ Medium Weight ~ Separating ~ 512 Lite Pink (1 Zipper/pack) YKK aluminum zippers are made from the highest quality metal. Thoroughly tested to ensure strength & reliability. Silver Teeth. Color may vary on your monitor.