Martin Cox MOGG105 20L White Detaling Valeters Bucket 20 Litre Pail & Lid

im looking to get into bucket drumming would anyone recomend these for this?

What is size diameter and height

Can i know the height of this item in inches and centimeters?

Is this bucket the same diameter at the top and bottom? I'm using it as a mould and ideally it needs to have flat sides and not be tapered. Thank you