Weld Mount AT-850 3.5in Square Mixing Tip Pack of 100 For AT-2010, AT-8040, AT-4020The Weld Mount AT 850 3. 5in Square Mixing Tip is a precise replacement designed for AT 2010, AT 8040, and AT 4020 systems. This 100 pack ensures you stay equipped for ongoing projects and steady dispensing performance. Compatibility: Compatible with AT 2010, AT 8040, and AT 4020 Weld Mount systems. Size & Profile: 3. 5 inch square mixing tip optimized for thorough, uniform material blending. Split Entry Design: Separated entry path prevents cartridge