Product Overview
Machined Clear Acrylic Rack, 40 Coned Wells in Two Sizes, with a Lift-Off Shield Collar
Condition
Used, and the photos show it honestly. Both pieces are clear acrylic carrying light haze, fine scratches, and scuff marks across the top plate and the side faces. Whitish crazing runs along the top rim and the inside corners of the shield collar, and the bore walls show visible machining chatter from when the wells were drilled. Nothing is cracked, and the collar still seats squarely on the block. No manufacturer name, catalog number, or label appears anywhere on either piece. The original listing describes it as used and in good cosmetic shape, with signs of normal use including scuffs, scratches, and minor wear, and the photographs are consistent with that.
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Product Overview
This is a two-piece clear acrylic microcentrifuge tube rack: a solid drilled block holding 40 wells, plus a separate acrylic collar that lifts off and sits around the top edge as a shield wall. The wells alternate between two bore diameters, 20 sized for 11 mm tubes and 20 for 8 mm tubes, laid out in a staggered pattern so neighboring tubes clear one another. Viewed from the side, the bores bottom out in a cone rather than a flat floor, which is how conical-bottom microcentrifuge tubes seat all the way down instead of perching. Against the ruler in the last photo the block reads roughly 13 to 14 cm across the front edge; it is a tall clear box shot from above, so treat that as an approximate outside width rather than a spec. The construction reads as machined rather than molded: thick stock, drilled bores with tool chatter still visible in the walls, and bonded seams instead of mold lines.
Key Features
- Material: clear acrylic, both the rack block and the lift-off shield collar
- Well count: 40 total
- Well sizes: 20 bores for 11 mm tubes, 20 bores for 8 mm tubes
- Well bottoms: coned rather than flat, visible through the side of the block
- Layout: staggered two-diameter pattern across the top plate
- Construction: two pieces, drilled bores and bonded seams, no molding marks
- Width: roughly 13 to 14 cm across the front edge, read against the ruler in the last photo and approximate
- Markings: none - no brand, catalog number, or label on either piece
- Weight: listed at approximately 60 g in the original listing, not reweighed for this revision
- Temperature: ambient and chilled handling only, not autoclave safe
- Cleaning: mild soap and water, avoid harsh solvents
Applications
- Lab tech staging 0.2 to 2 mL microcentrifuge tubes through a pipetting run without them tipping over
- Molecular biology student keeping two tube diameters sorted in one bench footprint during a prep
- QC bench holding small sample vials upright between weigh-ins and readings
- Hobbyist chemist or maker organizing small vials and short parts where seeing through the block helps
Frequently Asked Questions
Does the lift-off collar come with the rack?
Yes. You get both pieces shown in the photos: the drilled acrylic rack block and the clear acrylic collar that fits around its top edge. Nothing else is included, and there is no packaging or documentation with it.
Will my tubes actually fit these wells?
The bores are sized for 11 mm and 8 mm tubes, which covers most common 1.5 to 2 mL and 0.5 mL microcentrifuge tubes. Tube molds vary between brands, so measure the outside diameter of your tube at its widest point and compare before you buy.
Can I autoclave it or run it through a hot cycle?
No. Acrylic is not autoclave safe, so keep this to ambient and chilled handling. Clean it with mild soap and water only. Strong solvents and alcohols craze acrylic, so keep those off it if you want the block to stay clear.
How rough is the cosmetic wear, really?
Surface level. Fine scratches and haze on the top plate and sides, scuffing you can see in raking light, and whitish crazing along the collar rim and corners. It photographs worse than it reads on a bench. The wells themselves are clean and open, and the two pieces still fit together square.
Why buy a single rack here instead of a multi-pack somewhere else?
Because you probably need one rack, not six. PartsMine sells the exact quantity you need rather than forcing a bulk lot on you. Shipping is $8 flat rate and free over $28, so a single piece like this usually lands cheaper delivered than a forced multi-pack you did not want. Same or next business day out of Idaho.
No brand stamp, no catalog number, no mold seams - just drilled acrylic and bonded edges, the kind of rack a lab had made instead of bought. Forty wells in two sizes, still square and still clear, and now it is your bench it has to earn a spot on.
