Specifications
| Model number | PU518 |
|---|---|
| Chair type | Cleanroom / ESD high-level PU stool |
| Seat dimensions | 400 mm wide × 400 mm deep |
| Overall height | 550–800 mm |
| Seat height adjustment | 550–800 mm |
| Base dimensions | 660 × 660 mm polished aluminium |
| Weight capacity | 20 stone / 127 kg |
| Gas lift | 20-stone-rated gas strut |
| Seat material | Moulded polyurethane (dissipative; cleanroom- and ESD-suitable) |
| Base options | ESD feet as standard; ESD castors or glides incur a price uplift |
| Mechanism | Single-lever seat-height adjustment |
| Guarantee | 5 years (2 years in shift / 24-7 use) |
| Delivery | UK mainland included. Scottish Highlands & Northern Ireland on request. |
Description
The PU518 ESD is a bench-height anti-static stool with a moulded polyurethane seat and footring, for standing electronics benches around 900 mm where a compact, backless seat keeps operators mobile. Purchased over 1,367 times to date.
An ESD chair is built with static-dissipative materials throughout, so the chair itself does not accumulate charge. It protects the workpiece alongside — not instead of — wrist straps, grounded surfaces and ESD flooring. For longer seated spells at the same bench, an ESD chair with a backrest such as the 301 is the better specification; for seated desks, see the desk-height PU516 ESD. The lab chair height guide confirms the class.
Seat
A moulded polyurethane seat — solid, seam-free and wipe-clean. It tolerates routine laboratory cleaning agents and shrugs off knocks, spills and daily wash-down, which is why PU is the default choice for busy shared benches. The dissipative PU seat has no fabric to shed or trap contamination.
Feet or castors
Supplied with feet as standard, which is usually right for a tall chair at a standing bench. Castors are available at a price uplift — specify soft-tyre for hard or vinyl flooring, and lock-off or lock-down castors where the chair must stay put. Consider the safety requirements of your working environment before choosing castors on a high chair.
Who buys from us
The ESD anti-static range is in daily use on electronics and R&D benches at Dyson, BAE Systems, Thorlabs, Plessey Semiconductors and Toshiba.
Ordering
Purchase orders accepted, VAT invoice supplied. Volume pricing from 4 units. Delivery included to mainland Britain. UK support and spares available — we have been supplying laboratory and technical seating since 1986.
Frequently Asked Questions
- What bench height does the PU518 suit?
- The PU518 is a high-height stool. Its seat adjusts from 550mm to 800mm, which suits standing benches finishing around 900 mm high. If you’re not sure, send us your bench height and we’ll confirm the right model.
- What is the weight capacity of the PU518?
- The PU518 is fitted with a 20-stone gas strut, which is approximately 127 kg.
- Is the PU518 suitable for ESD workstations?
- Yes. The PU518 is a fully earthed anti-static (ESD) stool. Every part is anti-static: the seat and backrest are earthed to the chassis, which connects through the chromed gas lift to the polished aluminium base and to ground via conductive ESD castors or glides. It has a dissipative moulded polyurethane seat, with a resistance to ground that does not exceed 10^10 ohms, tested with an OHM-STAT megohmmeter. It is also listed in our cleanroom range, as the polyurethane seat and polished aluminium base suit particle-controlled environments. It suits ESD workstations, electronics assembly and static-sensitive labs.
- Can I have feet or castors on the PU518?
- The PU518 comes with ESD feet as standard. ESD castors and glides are available for a price uplift. All options keep the chair’s anti-static path to ground intact; soft-tyre castors are recommended for hard or vinyl flooring.
- What guarantee and delivery apply to the PU518?
- UK mainland delivery is included in the price. Delivery to the Scottish Highlands and Northern Ireland is quoted on request. Every stool comes with a 5-year guarantee against normal wear and tear from the date of delivery, used under normal conditions during a conventional working day. In a shift or 24/7 working environment the guarantee is 2 years from the date of delivery. Purchase orders accepted from schools, colleges, universities, NHS trusts, government organisations and registered businesses. VAT invoice supplied. On finance systems we may appear as Mark Finn Lab Furniture or Lab Tables.

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