Take the guesswork out of finding your fillport.
Those who experience challenges with dexterity.
Those who have experienced vision changes.
All who want to ensure a complete, accurate fill every time.
Made from 100% biodegradable corn biomassees. You can be certain your Cierta is sturdy and secure without harming the environment.
Got a question? We’re here to help.
Cierta is designed for the 3/8" long needle that ships with the Tandem t:slim X2 cartridge. It will work with 1/2" long needles, however, you may experience misalignment if the needle is not completely straight.
If your needle becomes bent during your insulin fill process it may not align with the fill port on the cartridge. Check to see that your needle is straight. If the needle continues to be misaligned, rotate the syringe 45 degrees and try again.
All orders are shipped via USPS First Class Parcel Post. Most orders arrive within 5 days.
International shipping is available. Add Cierta to your cart and proceed to checkout to view shipping rates for your location.
Free shipping on all orders in the US.