Drawing Challenge day 4 - Paint Brush

This is my all time favourite paint brush. Can you guess the brand of it, and what medium?

My piece of string......

This is my offering for today ..... it is a piece of string from the back of one of my many unsold paintings...... it actually looks more like a piece of jewelery than string haha ..... maybe I should take up making jewelery with string and picture hanging thingamajigs!!!