What are the exact dimensions of the 20ml and the 30ml vial: diameter and height?

I do no know, I purchased the 10ml vials. It says 50 x 22 mm on the box.

Does the rubber seal on the inside of the vial have a small gap in the rubber to allow all of the med to be drawn up, or is it continuous on inside?

I've never seen what you mention. The rubber is a one piece seal with no holes. When you insert a syringe into it, it makes a hole, however, it seals up (this is the self healing feature they're talking about). So you tear the plastic cap off permanently, which exposes the rubber seal. It seals up so tight, that the contents can not escape even when upside down.

For the seller: What is meant by "self-healing"? I've never seen that before, aren't all multi-dose vials just made from identical butyl rubber?

Yeah it’s just like every other vial. Normal rubber tops

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KsTek Sterile Empty Vials with Self Healing Injection Port,with Flip Off Aluminum Cap,Sterile Package (3ml,10) 3Ml

Product ID: 587924079

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Details

Bottle type
Glass Bottle
Brand
Ks-Tek
Capacity
3 Milliliters
Material
Glass
Special features
Flip Top

🔄Self-healing injection port

🧪3ml precision volume

🛡️Steam sterilized at 121°C

Description

🧴 Elevate your sterile storage game with KsTek’s precision vials — because your samples deserve the best!

PRECISION 3 ML CAPACITY - Perfectly sized for single-dose applications, ideal for professional and clinical settings.
INNOVATIVE SELF HEALING PORT - Officinal PTFE-coated injection port that reseals after use, maintaining vial integrity and preventing leaks.
SECURE FLIP OFF ALUMINUM CAP - Easy-to-remove yet tamper-evident aluminum cap for quick access without compromising sterility.
STERILE ASSURANCE EVERY TIME - Individually steam-sterilized at 121°C for 20 minutes, ensuring absolute contamination-free use.
PREMIUM PACKAGING WITH STERILIZATION INDICATOR - Each vial is individually packaged in a sterilization indicator bag, guaranteeing visible proof of sterilization completion.

KsTek Sterile Empty Vials are 3ml single-dose glass containers featuring steam sterilization at 121°C for 20 minutes, a self-healing PTFE-coated injection port, and a flip-off aluminum cap. Individually packaged with sterilization indicators, these vials ensure maximum sterility and convenience for professional healthcare and beauty applications.

Specifications

ASIN	B09B7SSQ1L
Best Sellers Rank	#57,377 in Beauty ( See Top 100 in Beauty ) #17 in Nail Tool Sterilizers
Item model number	KSUS-SEV-M
Manufacturer	Ks-Tek
Package Dimensions	14.2 x 11.51 x 2.39 cm; 82 g

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