PEKYBIO Vial Racks for 4ml Vials, 50 Holes Sample Bottles Rack, Φ16mm, Pack of 1Pcs

These things look awesome and work exactly as advertised, they fit my vial ink samples perfectly!

Nice & sturdy. Perfect size for 2-4ML vials.

This holds my 5ML cryo sample vials perfectly. These are 16mm vials. The fit is perfect. Just enough clearance to make insertion and removal easy while also holding the vials upright without a bunch of wobbling around.Price, quality, and functionality are perfect for my needs.

If you know. This is the tray you’re looking for. 3ml vials = perfect fit

It holds a lot of 4 mL ampules snuggly

(See ratings explanation below the review)I needed another tray for reloading. (I shoot in competition and reload for cost savings and better accuracy) This worked well for .30 caliber brass. The 16mm measure is accurate. If you use this for the same purpose as I, make sure your brass diameter will fit. These are less expensive than traditional reloading trays. The only reason I didn't giv 5 stars is I used this for an other than intended purpose. I have no idea how this will work with test vials....My ratings system:5 stars...... I'm blown away by quality & value... a must buy! (I rarely give this)4 stars..... Pleasantly surprised, better than expected3 stars..... as advertised, got what I expected, any pros/cons balanced2 stars..... a little disappointed, I had hoped for better1 star ..... avoid, waste of time and money, junk (I rarely give this)

I call racks like this "loading blocks" because of how similar they are to ammo reloading blocks. But these for vials are the perfect way to hold glass vials while they are being filled and capped. We use various sizes of these to hold and cap sample vials for our products.