PetTest U-40 Insulin Syringes 31G .3CC 5/16" 100/Box

(26 reviews) Write a Review

Product Overview

PetTest U-40 Insulin Syringes are designed to be used safely for U-40 pet insulin injections. Manufactured using high quality surgical grade steel, our syringes are easy to use, safer to handle and provide greater comfort for your pet due to the thin, fine and sharp extra lubricated needle.


  • Thin, Fine, Sharp, Extra Lubricated Needle
  • Features half unit markings for more accurate dosing
  • Tri-Bevel Tip for Greater Comfort
  • Large Clear Unit Markings
  • Extra Wide Finger Grips
  • High Quality Surgical Grade Steel
  • Protective Needle Plunger Caps
  • Single Use Only

Package includes: 100 Sterile Insulin Syringes

By purchasing syringes you are asserting that you are over 18 years of age and that you intend to use these syringes for the treatment of diabetes or for another legitimate medical purpose.

Although it is not an issue in most states, some require the purchaser to have a prescription for syringe sales. Here we list the states and counties with their respective laws, but note that you are solely responsible for following the laws in your state. Suppliers may reserve the right to refuse any order in the event that filling such order would violate any federal, state, or local law or regulation. You must email us the prescription at in order for your shipment to be released.

CT, ME, NH, NJ, NY: REQUIRED OVER 10 SYRINGES These states require a prescription for quantities over 10 syringes. If you order over 10 syringes to these states, we must confirm your prescription.

IL: REQUIRED OVER 20 SYRINGES The state of Illinois requires a prescription for quantities over 20 syringes. If you order over 20 syringes to the state of Illinois, we must confirm your prescription.

DE, TN, US Virgin Islands: REQUIRED These states require a prescription to order syringes. If you order to one of these states, we must confirm your prescription.

FL (Miami-Dade, Monroe, Broward County): REQUIRED These counties require a prescription to order syringes. If you order to one of these counties, we must confirm your prescription.


(26 reviews) Write a Review

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  • 5
    Great Syringes

    Posted by Elizabeth Taylor on Jun 21st 2023

    We are so thankful for these syringes. They are the only short, 31G syringes we can find for use with u-40 insulin and our diabetic kitty really appreciates them! Thank you so much for offering this product at a very reasonable cost.

  • 5
    PetTest U-40 Insulin Syringes 31G .3CC 5/16" 100/Box

    Posted by P J on May 4th 2023

    I have a 10 lb sweetheart of a cat that was diagnosed with diabetes in January. These syringes are EXACTLY what I was looking, for as the 29 1/2 guage the vet sold me were too big and causing unnecessary discomfort imo. Thank you!

  • 4

    Posted by Lynne on Apr 11th 2023

    I live these they are easy to use and they seem shorter which seems to be less painful to my cat

  • 5
    I love the thin needle and the easy to see numbers

    Posted by Rhonda Erickson on Jan 16th 2023

    pet test .3cc 5/16 inch needle

  • 5

    Posted by Thomas Lusby on Aug 22nd 2022

    Been using them for two years. Hard to find had to wait for them but that’s OK I understand about the shortage I used the .5 cc and that was fine. Thanks again, Tom.

  • 5
    Love the length

    Posted by Lorrie Anne Stacey on Jan 9th 2022

    I wasn’t given a choice of length at vet thank you

  • 4
    U-40 syringe

    Posted by Thomas Lusby on Nov 10th 2021

    Sometimes I get a syringe that is not sharp.

  • 5

    Posted by Sandra Correa on Sep 27th 2021

    Best ever! Small and my pet does not feel Needle. Plus a very good deal cost wise.

  • 4
    What a difference these needles make!

    Posted by Trish M on Jul 23rd 2021

    My dog was diagnosed less than a month ago and I was given 29g 1/2 syringes. She is a small toy poodle with Cushing's disease and her skin is very thin and delicate. I'm new to injections so I know I was causing her more discomfort than necessary. These make SUCH a difference. She no longer squirms and the ordeal is over much faster. The 1/2 unit markings are great as well.
    The only reason I didn't give 5 starts is because the syringes come in packs of 10 and are not individually wrapped. I'm very paranoid about contamination and keep the open bag in an airtight container. Please PetTest, wrap them individually.
    But my little girl and I are VERY grateful!