Weld Mount AT-850 3.5in Square Mixing Tip Pack of 50 For AT-2010, AT-8040, AT-4020The Weld Mount AT 850 Mixing Tip offers precise 3. 5 inch square geometry for AT 2010, AT 8040, and AT 4020 systems. Sold in a 50 pack, it provides dependable mixing performance across demanding welding tasks. Tip Size & Geometry: 3. 5 inch square mixing tip designed for AT 2010, AT 8040, and AT 4020 systems. Compatibility: Compatible with AT 2010, AT 8040, and AT 4020 welding systems. Separated Entry Design: Prevents cartridge plugging, promoting