8 1/2'' overall length x 5 3/8'' wide tank brush, polypropylene block filled yellow medium-soft polyester, for cleaning tanks, vats and gullies. The #D77 offers dense coverage, the only side not filled is where the handle fits. Recommended handles, #ALH27 or ALH8. For a resin set version, see #D77RES. A stiffer version is available, #D79.