Oil based 2-1/2" Purdy 144024425 Adjutant Angled Sash Paint Brush, White China Bristle Pack of 1 https://www.amazon.com/dp/B00002N8YJ/ref=cm_sw_r_apan_glt_fabc_1MNXZWM76X4JHXASMNEX?_encoding=UTF8&psc=1