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ITP Straight Styli - Type A - Ruby Ball - M3 Thread x 21mm Overall Length - THM302004021
| Styli Type | Type A |
| Thread Size | M3 |
| Ball Diameter (DK) | 2 |
| Overall Length (L) | 21 |
| Shank Diameter (DG) | 4 |
| Measuring Length (ML) | 15 |
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The ITP Straight Styli – Type A with Ruby Ball is a precision probing stylus designed for metrology work, offering a rigid carbide stem and a high-quality ruby ball for dependable, repeatable measurements in CMMs and other probing systems.
- Tip Size Range: Ruby ball tips available from Ø0.5 mm to Ø6.0 mm to match diverse feature geometries and inspection tasks.
- Shank Material: Carbide stem delivers exceptional rigidity and dimensional stability under probing loads.
- Thread: M3 thread compatibility for quick, secure mounting in standard probe housings.
- Overall Length: 21 mm, placing the ruby ball at an optimal probing height for common fixtures and setups.
- Straight Geometry: Classic straight stylus design built for everyday, standard-use measurements.
- Custom Sizes: Additional tip diameters can be requested via the configurator or by email to fit specialized applications.
Built for reliability in routine inspection workflows, this stylus minimizes deflection and wear thanks to its carbide backbone and durable ruby ball. The combination supports consistent contact data across multiple passes and feature types, from flat faces to tight pockets. Whether you’re upgrading an existing probing setup or configuring a new one, the Type A ruby-ball stylus provides a robust, easy-to-integrate solution with flexible sizing options.
| Styli Type | Type A |
| Thread Size | M3 |
| Ball Diameter (DK) | 2 |
| Overall Length (L) | 21 |
| Shank Diameter (DG) | 4 |
| Measuring Length (ML) | 15 |
| Neck Diameter (DS) | 1 |
| Stem Material | carbide |
| Base Material | stainless steel |
| Prob Ball Material | ruby |
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.


