Generally considered a good value for the price, especially when bought in bulk (e.g., 200 or 1000 count). They are useful for one-time storage or mailing small goods.
If you are looking for "Spartan" zipper accessories for backpacks or tactical gear, these are injection-molded nylon pulls designed to replace generic cords. Spartan Zip Pulls 6 Pack (Coyote Tan) - Amazon.de Spartan.zip
If you need heavy-duty storage, look for the "4 Mil" thickness variant rather than the standard "2 Mil" version to avoid tearing. Vanquest Spartan Zipper Pulls Go to product viewer dialog for this item. Generally considered a good value for the price,
Many users report that the plastic is extremely thin and flimsy. The ziplock mechanism is frequently described as "too tight," which often causes the bag to tear while you are trying to open it for the first time. Spartan Zip Pulls 6 Pack (Coyote Tan) - Amazon
These are clear, resealable plastic poly bags used for organizing small items like jewelry, medication, or hardware.