There are several variations of valve brushes with a flat nylon brush.
Items
A2261-5X01

(Formerly A2261-5X01), Valve Brush, 2 1/4" X 3/8" Flat Nylon, 1/8" Female NPT Inlet

B1049-5X00

(Formerly B1049-5X00), Angled Valve Brush, 2 1/4" X 3/8" Flat Nylon, 1/8" Female NPT

B1008-5X06

(Formerly B1008-5X06), Angled Valve Brush with Drip Tube, 2 1/4" X 3/8" Flat Nylon, 1/8” Female NPT Inlet

B1009-5X00

(Formerly B1009-5X00), Horizontal Valve Brush with Drip Tube, 2 1/4" X 3/8" Flat Nylon, 1/8” Female NPT Inlet

B309-1X00

Valve Brush, 2 1/4” X 3/8” Flat Nylon, 1/4” OD Tube Inlet
Feature N/A Straight N/A Angled N/A Angled, Drip Tube N/A Horizontal, Drip Tube N/A Straight
Brush Type N/A Flat
Brush Size N/A 2 1/4" X 3/8"
Bristle Material N/A Nylon
Inlet N/A 1/8" Female NPT N/A 1/8" Female NPT N/A 1/8" Female NPT N/A 1/8" Female NPT N/A 1/4" OD Tube