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ITP Straight Styli - Type A - Ruby Ball - M3 Thread x 50mm Overall Length - THM303005050
| Styli Type | Type A |
| Thread Size | M3 |
| Ball Diameter (DK) | 3 |
| Overall Length (L) | 50 |
| Shank Diameter (DG) | 5.5 |
| Measuring Length (ML) | 31.5 |
Learn more about Klarna
ITP Straight Styli - Type A with Ruby Ball is a precision probing stylus designed for everyday measurement tasks. Its carbide stem delivers exceptional rigidity, while the ruby ball tip ensures accurate, repeatable contact on delicate surfaces.
- Model: Type A Straight Stylus for standard probing tasks.
- Tip: Ruby ball tip with diameters from Ø0,5 mm to Ø6,0 mm for precise contact and durable wear resistance.
- Stem: Carbide stem provides extreme rigidity to maintain straightness under probing forces.
- Connection: M3 thread for secure mounting to compatible probes and measurement systems.
- Length: 50 mm overall length, offering a balanced reach and control in tight spaces.
- Customization: Further ruby ball sizes can be requested via the configurator or by e-mail.
- Product Code: THM303005050
In practice, the carbide stem minimizes deflection for consistent readings across multiple cycles, while the ruby ball tip protects workpiece surfaces and provides a small, repeatable contact area for high-resolution probing. The 50 mm reach is ideal for accessing recessed features without sacrificing stability, and the standard M3 thread ensures compatibility with a wide range of probing setups. If you need a specific ruby ball size beyond the Ø0,5–Ø6,0 mm range, you can request a custom diameter through the configurator or by email to tailor the stylus to your exact measurement tasks.
| Styli Type | Type A |
| Thread Size | M3 |
| Ball Diameter (DK) | 3 |
| Overall Length (L) | 50 |
| Shank Diameter (DG) | 5.5 |
| Measuring Length (ML) | 31.5 |
| Neck Diameter (DS) | 2 |
| 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.


