well now it worked and got pretty crappy roll.
saw ppl asking mana boots 50+ mana , how can thy roll 50 mana when recipe says +20 mana and 5% maximum mana max ?

Charsi.

It's to do with mods that roll on boots. See arreat summit for more info

mana mod additive to the base mod that can be rolled

Yeah, just check charsi for the graphic type, doesn't matter if normal/exceptional/elite, so long as it's magical.

Or, you can refresh gambling pages until you see the appropriate item type and just use that (so long as the gamble doesn't turn out to be rare / set / unique).

i always gamble to control the item level. plus i'll gamble until the rarity i want rolls as well, although i usually craft gloves, obsessed with blood gloves. never roll a good pair, but keeping at it!