Carbon motor brush, fitness:miter saw,chop saw,drill, hammer drill,dust collector,blower motor,motorcycle,weed whacker,cut-off saw Carbon Brush Size (Approx.): 20mm x 7mm x 7mm(L*W*H),Spring Length: 28mm(1.1'),Net Weight: 7g; This size can be made to fit most tools with replaceable brushes. Set includes 2 brushes,Replace brushes every 60 hours Material: Carbon, Metal; Main Color: Gray, Gold Tone