The correct brush size makes the difference between a thin, even coat and an over-lubed mess.
Topre slider rails are narrower than MX housings. A brush too small leaves uneven coverage and requires multiple passes. A brush too large deposits too much lubricant in a single stroke. After testing over a dozen options, this is the one brush where the bristles fill the rail completely — one clean pass, consistent coverage, every key.
Sold individually.