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Ships within 48 hours · Estimated delivery Jul 5 - Jul 10
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Description
Ahlstrom Grade 542 Fluted Filter Paper - 100 CirclesAhlstrom Grade 542 Fluted Filter Paper 100 Circles Ahlstrom Grade 542 is the pre pleated version of Grade 642. Pleating improves the effective surface area which increases flow rate and loading capacity, thus decreasing filtration time. Ahlstroms pre pleated grades can save valuable time and maximize the efficiency of the laboratory filter system. Grade: 542 Diameter: 385mm and 185mm available Retention in m: 2. 0 m Filtration Speed punch Herzberg sec
Ahlstrom Grade 542 Fluted Filter Paper - 100 Circles
Ahlstrom Grade 542 is the pre-pleated version of Grade 642. Pleating improves the effective surface area which increases flow rate and loading capacity, thus decreasing filtration time. Ahlstrom’s pre-pleated grades can save valuable time and maximize the efficiency of the laboratory filter system.
- Grade: 542
- Diameter: 385mm and 185mm available
- Retention in µm: 2.0 µm
- Filtration Speed punch Herzberg sec/100mls: 229
- Filtration Speed Rapidity mls/min: 30
- Loading Capacity: Medium
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 1814 reviews
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Product Reviews
★★★★★ 5
MY DOGS LOVE THIS TOY
Color: Squirrels (3-pack)
Great puzzle toy. Dogs play with it all the time.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Perfect Toy for the Picky Dogs!
Color: Squirrels (3-pack)
These are replacement squirrels. I had these for my own dogs. When I noticed how much enjoyment they got out of them, I purchased them as gifts.
My brother’s 20 lb dog is so picky, but I took a chance. The squirrel toys are the only ones he plays with. According to my brother, his dog ignores treats and toys, but loves the squirrels.
A friend of mine said the same thing. She also has small dogs, 25 lb & 30 lb. They preferred the squirrels.
This toy is not for big dogs. Unless they’re gentle, they will probably be torn apart very quickly.
They are very easy to chew on, the squeak isn’t loud, there’s no smell and very entertaining!
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Reviewed in the United States on November 20, 2025
★★★★★ 5
Dog Approved
Color: Squirrels (3-pack)
The toys are soft but well made, and my dog really likes that they squeak. He loves carrying them around and hunting for them when I hide them.
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Reviewed in the United States on June 7, 2026
★★★★★ 5
Super Sturdy with hours of fun.
Color: Wild Duck, Hare, Squirrel & Alligator, Size: Small
I got the small ones that you cannot put a water bottle in.
These toys have held up way better than expected. I am dog sitting a very rough with toys dog named Chunk. He tears up ever. Single. Toy my dog (Ted) has.
I bought new ones just for chunk. These appealed to me with the no stuffing, They were cheaper, and have a squeaker. Everything chunk needed. They arrived on time and I thought I wasted my money. They were super soft, like too soft. They felt flimsy and weak. Like 5 minutes with chunk and they be dead. 2 hours with my dog and they would have a rip. So far 2 of them (I set two out) have lasted the whole weekend. The bunny looks very rough and disgusting, but no rips, the squeakers still work, and no random fluff everywhere. I am going to wash the bunny once chunk leaves.
My very careful doggo Ted loves them too. He throws them up in the air and catches them, plays tug of war with them, and no rips. They are super sturdy. He can’t wait until Chunk leaves (chunk is 2 and Ted is 12-13) so he can play with them.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Loved it
Color: Brown/Wild Duck, Size: Large, Color: Brown/Wild Duck, Size: Large
He loved it so much, he destroyed it so we ordered another.
I didn't realize that you can stick an empty water bottle inside.
Again, the first one didn't last long, but he enjoyed it
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Reviewed in the United States on May 20, 2026