Problem with a flapping letterbox? Maybe your spring has broken. You could repair it with these. Some DIY skills required.
Small Torsion Springs 4 different sizes 38mm, 32mm, 25mm, 19mm -
two
of each.
Equivalent imperial measurements - 1 and a 1/2", 1 and a 1/4", 1" and 3/4"
Condition is New.
Made in the EU.
Dispatched with Royal Mail 2nd Class.