


Tweezers Assembly for Vitrobot Mark IV, III, II & I
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Tweezers Assembly for Vitrobot Mark IV, III, II & IShown with standard slide clamp (#47000 500) top, self closing tweezer (#47000 505) at bottom Complete replacement tweezers assembly for the FEI Vitrobot Mark IV I. Includes ultra fine points DUMONT #5 tweezers mounted on dovetail. Available with either a standard slide clamp (#47000 500) or self closing tweezer handle (#47000 505). The new self closing Vitrobot tweezer enables one handed operation when picking up releasing a grid and eliminating the
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.6 ★★★★★
Based on 1564 reviews
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Product Reviews
★★★★★ 5
Durable
Style: Black chew toys for dogs
My hound dog seems to like hers. She greets me at the door every day with it in her mouth and she hasn’t been able to tear it up or get any little pieces in her mouth when she nib nibs on the edges. It doesn’t have a smell. It is hard. It seems safe I guess since they can’t pick it up with their paws and pop each other over the head with it but if you have an intruder it would be great to have in hand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
★★★★★ 5
Tough product
Style: Black chew toys for dogs
Received a timely manner and so far my puppy has no destroyed it yet, although he did his best to.
Good product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
★★★★★ 5
Surprisingly Tough Without Being Too Hard
Style: Black chew toys for dogs
The hardness on this bone is right in the sweet spot for aggressive chewers. It’s firm and durable enough that my dog hasn’t been able to tear chunks off or destroy it quickly, but it’s not rock-hard to the point where I’d worry about teeth damage.
My dog usually goes through most toys pretty fast, and this one has held up really well. After extended chewing sessions, it only shows minor wear instead of deep cracks or breakage. It keeps his attention without splintering or becoming unsafe.
If you’re looking for a bone that can handle strong jaws while still being safe for aggressive chewers, this one strikes a good balance and has been a solid option so far.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 2, 2026
★★★★★ 4
Not completly indestructible but good buy
Style: Black chew toys for dogs, Style: Black chew toys for dogs
Dogs loved this. I have 5 pot mixed and they all have enjoyed this. I ordered two more after they enjoyed the first one so much. So far my dogs have not been as destructive as they have been in the past (especially on my couches). I have been home more recently so it could be a combination, but I think the bones have been helpful. Sturdier than the red Kong toys, but not as indestructible as the black kongs. As durable or more than the ruff dawg balls, and much more affordable than all of those. Also, some of my dogs are more selective on toys, but this one was an immediate hit, even with my dog that has shown now interest in ANY chew toy. We even walked through pet smart one day, and i tried to get him to play with every toy on the shelf- and he was not impressed. I even showed him the scented toys that cost $40-50 each. Happy that he took to this immediately.
Keep an eye out. I heard one of my dogs hacking and coughing from the other room, but by the time I heard it and got to the room, it wasn’t clear what he was choking on. I had three of these bones in the room at the time, but there was also food and such around so hard to tell. Recommend supervising your dog with the toy in the beginning at least.
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Reviewed in the United States on April 28, 2024
★★★★★ 5
Lasts with a pitbull
Style: Black chew toys for dogs
Good for very aggressive chewers. Even large, strong jawed dogs. My 70lb pitbull loves them and they usually last 6 months before we have to replace (because she's chewed slowly down the ends) Would recomment!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
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