#5 Brass Nomex® Two-Way Separating Zipper

#5 brass Nomex® two-way fire retardant zippers are made of medium-weight metal and feature teeth with a shiny gold/brass finish that measure approximately 5mm (1/4 inch) wide when zipped. The zipper tape is made of fire-retardant, high-temperature resistant Nomex® material. Zippers separate at the bottom, jacket-style. 

These are two-way separating zippers. They have two sliders - one that zips from the top down, and one that zips from the bottom up. 

These zippers are UL® tested and certified.