Check every couple years and replace when down to 3/16".
Carbon Block Dimensions: L: 1-1/8", W: 1/4", H: 7/16"
How to Check and Replace Carbon Brushes.
Carbon Brush fits Lamb Ametek Vacuum Motors: 119400, 119402, 119412 and 119413. Earlier power unit models may have used a different motor.
Color may vary.
SOLD INDIVIDUALLY, price is for a SINGLE brush.