Representative photo · we photograph your actual box before it ships
Dexcom G7 15‑Day Sensor (STP‑FT‑012)
One sensor per box · 15-day wear
Is this the right one? Not Dexcom G7 (10-Day) · not Dexcom G6
You're looking at Dexcom G7 15-Day Sensor (STP-FT-012).
Exact box: REF STP-FT-012. Factory sealed. Choose an expiration month below; each is a real date from our warehouse count.
The longest-wearing Dexcom G7. It's the same small, all-in-one sensor as the original G7, rated for 15 days, so you change sensors about a third less often.
- Wear: up to 15 days, plus a 12-hour grace period to swap in your next sensor
- Warm-up: about 30 minutes
- Calibration: none needed, no routine fingersticks
- Water: water-resistant, rated for up to 8 feet for 24 hours
- Ages: 18 and older
- Insulin pumps: check Dexcom's current compatibility list before pairing with a pump.
Make sure it's yours: your box says "15 Day." This is not the 10-Day G7 or the G6, and they aren't interchangeable.
What do you pay now?
Compares against the option selected above, at 15 days per sensor. Nothing you type here is saved or sent.
How many do I need?
Uses 15 days per sensor. Delivery: Options and prices for your address show at checkout.
Questions people ask first
What's actually inside the box?
What if I order the wrong version?
Tell us before it ships and we'll swap it at no cost. After it ships, you can return or exchange any sealed, unopened box within 30 days. If the mistake was ours, we cover the return label.
Why is this cheaper than my pharmacy?
These are sealed, unused boxes that people no longer needed, like after a device switch or an over-supply. We buy them from individuals, check every box, and sell below retail cash price. We're an independent reseller, not a pharmacy or an authorized distributor, and we don't bill insurance.
How do I know it's authentic?
Every box is checked for product identity, an intact factory seal, its expiration date, and active recalls, and it's photographed before it ships.
Can I reorder this easily next month?
Yes. Your account keeps your past orders so you can buy the same thing again. No subscription required.
Who is Spare?
Spare is run by Humble Medical Supply in Casa Grande, Arizona. We've spent years in the diabetes supply business, and we started Spare so people paying out of pocket can get sealed supplies at a fair price. Real people answer at (888) 604-0655, Mon–Fri, 9am–5pm ET.