Zen Bundles Zen Pipe Cleaners Hard Bristle, 132 Count Zen the name you know & can trust for all your cleaning needs & 420 help Clean & repair old antique tube radios, t.V.'S, ham radios / receivers (especially from 1918-1965) Such as philco, rca, admiral, Zenith, hall crafters, sears, Brewster, crossly, firestone, plus hundreds more Arts & crafts projects for many pre-school, kindergarten, elementary & jr. and high school teachers, as well as Sunday school classes