Overloads boost Attack, Strength, Defence, Ranged, and Magic + 15% of the stat level + 3 (a maximum of +17 at level 99) for six minutes. Overloads reapply the boosts every 15 seconds, resulting in minimal boost decay - however, once the overload wears off, the boosts are completely removed. Upon death, the effect of overload will also wear off entirely before the six minutes is up. The flask is made by blowing robust glass, requiring 89 Crafting and giving 100 experience. Red sandstone can be mined at Oo'glog and smelted using the Robust glass machine also located at Oo'glog.