What is the inside & outside diameter ?

OD = 2.40 in / 61.0 mm +/- 1.30 mm , ID = 1.40 in / 35.55 mm +/- 0.85 mm , this is also conveniently located in the product description in the listing.

Can these be cut into two identical half toroids? I want create two identical electromagnets.

Perhaps the snap-on beads would be a better application. The toroids have a specific shape to keep the magnetic flux within the loop. So while I can’t answer if breaking them will work in your case, but it sounds like using a hammer when you need a wrench. Could it work? Maybe, but bludgeoning seems a bit wasteful. YMMV Maybe try Mix 31 beads.

Need toroid for 1mhz thru 30 mhz

FairRite and the listing description give the following specifications: Frequency Range: 1 - 300MHz , EMI Suppression 1 - 500 MHz

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🛠️ Elevate your circuit’s noise immunity with precision-crafted power!

PLUG AND PLAY READY - No batteries or additional components needed—simple integration
COMPACT LIGHTWEIGHT - Just 109g and 7.6 cm diameter—fits seamlessly into your designs
DURABILITY YOU CAN TRUST - Robust ferrite material built to last in demanding environments
INDUSTRY STANDARD QUALITY - Manufactured by Fair-Rite, a trusted name in electromagnetic components
ENGINEERED FOR PERFORMANCE - Type 31 ferrite core optimized for high-frequency noise reduction

The Toroid Core FT240-31 Ferrite by Fair-Rite is a compact, 109g Type 31 ferrite core designed for effective electromagnetic interference (EMI) suppression. Measuring 7.6 x 7.6 x 0.6 cm, it offers durable, high-frequency noise reduction in a lightweight, easy-to-integrate form factor favored by professionals seeking reliable circuit performance.

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Manufacturer	Fair-Rite
Part number	FT240-31
Item Weight	109 g
Product Dimensions	7.62 x 7.62 x 0.64 cm; 109 g
Is Discontinued By Manufacturer	No
Material	Ferrite
Measurement System	Metric
Batteries Included	No
Batteries Required?	No
Item Dimensions LxWxH	7.6 x 7.6 x 0.6 cm

Toroid Core FT240-31 Ferrite

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