re-useable stiff nylon bristles on metal handle
good for cleaning with grain alcohol for a deep clean
mortise and chamber brushes come in packs of 2
airway brushes are now sold individually

chamber brush;
Overall length: 3.07″/78mm
Diameter (at bristles): 0.79″/20mm

mortise brush;
Overall length: 2.90″/74mm
Diameter (at bristles): 0.40″/10mm

airway brush;
Overall length: 7″
Length, brush – 2.5″
Diameter, brush – 0.20″/5mm