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Construction crate (large) was removed from RuneScape after an update, but still exists in-game for those who had obtained it.
Construction crate (large) detail

The Construction crate (large) is an item that can be won from Treasure Hunter which contains a variety of construction materials; there is also a chance for an additional reward. The exact materials are based on the player's level, and the amount is more (four times) than what is in the smaller crate. It replaces the huge lamps of the corresponding type. During the weekend of 12 October, players had twice the odds of getting this crate than usual. From 18 January–21, this crate was available in the Uncommon slot of the Squeal of Fortune, rather than the Rare slot.

Possible contents

Construction Level Rewards Amount Total XP earned
from Crate
Convert to Coins Value
55 Oak plank 192 11520 50,000 72,768
77 Teak plank 288 25920 200,000 86,112
85 Mahogany plank 288 40320 320,000 238,752
90-99 Mahogany plank 432 60480 600,000 358,128
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