Large industrial block brush with densely filled anti-static horsehair bristle and a static-neutral hardwood handle. This durable, multi-purpose brush has a 6 x 19 row configuration, with a 1/4" trim, and a brush face of 6-5/8" x 1-7/8". Wood block handle is 7-1/8" x 2-1/4". This large flat scrub brush is very effective at reworking large printed circuit boards, or for general cleaning over larger surfaces. The shorter trim model is extremely stiff rendering it tougher in scrubbing ability. For a longer trim horsehair bristle large block brush see part # 426HH.