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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
Van De Graaff Discharge Ball with HandleA Van De Graaff Discharge Ball with Handle is a scientific demonstration device used to illustrate principles of electrostatics and discharge phenomena by generating static electricity and allowing for controlled release through manipulation of the handle. Product Code Type Descriptions SE. PA4140 006 Discharge Ball with Handle 80mmD, stainless steel SE. PA4143 007 Discharge Ball Only 80mmD, stainless steel, for all models SE. PA4137 005 Discharge
A Van De Graaff Discharge Ball with Handle is a scientific demonstration device used to illustrate principles of electrostatics and discharge phenomena by generating static electricity and allowing for controlled release through manipulation of the handle.
| Product Code | Type | Descriptions |
| SE.PA4140-006 | Discharge Ball with Handle | 80mmD, stainless steel |
| SE.PA4143-007 | Discharge Ball Only | 80mmD, stainless steel, for all models |
| SE.PA4137-005 | Discharge Ball Only | 200mmD, stainless steel; for new 200kV model, w/location pin and dress ring for mouth |
| SE.PA4134-004 | Discharge Ball Only | 250mmD, stainless steel |
| SE.PA4138-005 | Discharge Ball Only | 300mmD, stainless steel; for new 400kV model, w/location pin and dress ring for mouth |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.2 ★★★★★
Based on 1148 reviews
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Product Reviews
★★★★★ 5
Finally a mount for my truck!
2015 Toyota Tacoma Prerunner. I've tried many different mounts - ones that stuck to the dash, stuck to the windshield, one that mounted in the cup holder in the console. They all were bad in their own way. This Offroam mount finally got it right. Easy installation - and when I say SOLID hold I mean it. No movement, no rattle, do creaking sound, etc, etc. I was very skeptical of the one-handed use getting the phone in and out but it's really a genius design.
Seriously - I just got it, so can't really speak to longevity yet. Judging by the design and quality of parts, I'll say it will be the last mount I ever purchase for this truck. Pay the extra, and be happy.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Great Quality, Perfect Fit
2015 Tacoma. This fit perfectly and is solid. Last/Different one I had on another vehicle broke one of my vent dividers. That can't happen with this design. Worth the money. Would absolutely recommend.
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Well build and functions nicely
The products build quality is excellent; in fact, its far superior to this product's competitor, "Batdiary". This mount stays locked in place when i use one hand to mount my phone or remove it. Also, the internal mechanism is much nicer than the Batdiary one and feels like it has tighter and more accurate machining tolerances which should prevent it from rattling like its competitor's did after a couple weeks use.
I highly recommend this product, it is worth the high price tag!
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Reviewed in the United States on November 6, 2025
★★★★★ 4
Buy once, cry once
This Offroam phone mount is not the cheapest option, but it is easily the most functional and sturdy one available, especially for second-generation Toyota Tacomas. I went through several plastic phone mounts before this and should have bought this one from the start to save both money and frustration.
Installation was very simple, and it is even easier to use day to day. I like that this mount uses adjustable arms to grip the phone rather than relying on MagSafe. It keeps my phone secure even on rough terrain and offers plenty of flexibility for positioning the phone exactly where you want it.
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Reviewed in the United States on January 25, 2026
★★★★★ 5
Top notch mount with high build quality
I love it when I take a chance and spend some extra money hoping for a quality product - and it actually pans out. I bought this for my 2nd gen Toyota Tacoma (2014). The install was fast. Instructions were clear. The mount is ROCK solid and has two points of articulation so I can position my phone well. I couldn't ask for a better product. The price I paid was a little steep for a mount, but if you demand quality then look no further.
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Reviewed in the United States on October 21, 2025