USD 1,035 (maker's listed price)
All-Terrain Knee
Mechanical knees. A waterproof four-bar mechanical knee with an automatic stance lock and non-hydraulic cadence control.
Blatchford
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Blatchford · Mechanical knees · PR-022
Blatchford ESK+ Stance Control Prosthetic Knee
The Blatchford ESK+ is a mechanical prosthetic knee whose stance control switches on when the wearer puts weight through it, and can be adjusted. Swing is handled by a pneumatic cylinder that is set for walking pace. Two versions exist: Stanceflex at 1.13 kg, and a 4-Bolt at 1.15 kg that lowers build height. It flexes to 140 degrees and takes users up to 125 kg.
- Activity level
- 2 to 3
- Max user weight
- 125 kg
- Knee flexion
- 140 degrees
- Component weight
- 1.13 kg (Stanceflex); 1.15 kg (4-Bolt)
Blatchford ESK+ key features
- Weight-activated stance control, adjustable
- Pneumatic swing control tuned to walking pace
- Stanceflex version for added comfort in stance
- 4-Bolt version reduces build height
- Build height 238 to 262 mm
- 140 degrees of knee flexion
Who the Blatchford ESK+ suits
Designed for moderately active transfemoral users at Activity Level 2 to 3 who want a knee that holds under load without electronics. The choice between Stanceflex and 4-Bolt is made with a prosthetist.
This kind of device is prescribed and fitted by a clinician. An enquiry starts that conversation. It is not a purchase.
Figures for comparing
- Weight
- 1.1 kg (2.4 lb)
- Max user weight
- 125 kg (276 lb)
The same units on every product, converted from the specifications below. Where a source gives two limits, the lower one is shown.
Blatchford ESK+ specifications
| Activity level | 2 to 3 |
|---|---|
| Max user weight | 125 kg |
| Knee flexion | 140 degrees |
| Component weight | 1.13 kg (Stanceflex); 1.15 kg (4-Bolt) |
| Build height | 238 to 262 mm |
| Stance control | Weight activated, adjustable |
| Swing control | Pneumatic |
| Maker country | United Kingdom |
| Price | Quoted on request |
| Brand | Blatchford |
| Category | Lower limb - knees, hips and leg systems, Mechanical knees |
| Catalog ID | PR-022 |
Compared with the source page on 5 October 2026. Details can change, so we confirm them in your quote. Open the source page.
Blatchford ESK+: common questions
What is the weight limit of the Blatchford ESK+?
The maximum user weight is 125 kg.
What is the difference between ESK+ Stanceflex and 4-Bolt?
Stanceflex adds stance flexion for comfort and weighs 1.13 kg. The 4-Bolt weighs 1.15 kg and reduces build height.
Does the ESK+ need a battery?
No. Stance control is weight activated and swing is controlled by a pneumatic unit, so there are no electronics to charge.
How to get a quote for the Blatchford ESK+
Add it to your enquiry list
Press Add to enquiry. You can add other products and parts to the same list.
Tell us your country and needs
Send the list with your country, sizes and any options you want. No payment details are asked.
Get a personal reply
You receive availability, a price and delivery options by email, and decide after that.
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