This slings are designed for use in rescue systems.  They have a 30kN minimum breaking load and are individually serial numbered.  The lengths given are the useable length, i.e. If you lay the sling on the ground and pull the ends as far apart as you can the distance between the two ends is the length shown.

Lyon 25mm sewn nylon sling 60cms LSL25.60 £2.99 Lyon 25mm sewn nylon sling 120cms LSL25.120 £4.25 Lyon 25mm sewn nylon sling 240cms LSL25.240 £6.99 Lyon 25mm sewn nylon sling 480cms LSL25.480 £11.75