1.5 Kg Muntons Light Malt Extract (Liquid)

It's been in 1.8 kg tin for years and now it's a 1.5, it costs a bit less as well.

1.5 kg is the usually  right amount for a five gallon brew. You'll need a Kg of sugar to go with it . It will give an OG of about 1039 with the sugar

Use the light for lagers, pale ales and bitters.

If a recipe is just asking for a malt extract then it's probably this one.