MIDWEST FASTENER CORP
MIDWEST FASTENER CORP 65904 #11 Black Rubber Stoppers 2PK
Two-pack of size 11 black rubber stoppers measuring 2.2 inches by 1-15/16 inches by 1 inch for sealing bottle openings
- #11 size fits standard lab bottles
- 2 inch height provides secure closure
- Black rubber resists chemical exposure
- Two stoppers per pack for spare use
- California Prop 65 warning included
#11 Black Rubber Stoppers
These #11 black rubber stoppers are laboratory supplies designed to temporarily seal bottle openings. They come in a two-pack from MIDWEST FASTENER CORP and are sold new. The stoppers measure 2.2 inches by 1-15/16 inches by 1 inch.
Installation and common issues
Installation is straightforward: press the tapered stopper firmly into the bottle neck to create a seal. The main issue is selecting the wrong size; a stopper that is too small will leak while one that is too large will not seat properly. California Proposition 65 warnings indicate the material contains chemicals known to cause cancer and reproductive harm.
Capacity and headroom
The two-pack provides a spare stopper for immediate replacement if one is lost or damaged. Each stopper handles a single standard bottle opening at a time. The supply runs out when both stoppers are in use or misplaced, requiring a new pack for additional sealing tasks.
Highlights
- #11 size fits standard lab bottles
- 2 inch height provides secure closure
- Black rubber resists chemical exposure
- Two stoppers per pack for spare use
- California Prop 65 warning included
Specifications
| Brand | MIDWEST FASTENER |
|---|
Questions about this item
How can I confirm the #11 rubber stopper fits my bottle after installation?
The stopper should sit firmly in the opening with no gaps around the 2.2 inch top diameter; a snug seal that holds liquid without leaking shows it is working as intended.
What comes in the package and what must I supply myself?
The box contains two #11 black rubber stoppers measuring 2.2" x 1-15/16" x 1"; you will need to provide the bottle or flask that matches the #11 taper.
When should I choose the #11 size instead of another stopper number?
Select the #11 stopper when your bottle neck requires a 2.2 inch top diameter and a 1-15/16 inch bottom diameter; other numbers correspond to different taper dimensions.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
