Oval dispensing tips handle epoxies, sealants, pastes, gels, and other high-viscosity materials when the gauge and outlet size match the required ribbon width. Larger IDs, such as 2.8 mm at 10 gauge and 2.5 mm at 11 gauge, reduce restriction for heavier materials and support higher ribbon volume per cycle. If flow surges or stalls, check material viscosity, back-pressure, and outlet ID together before changing gauge. In many cases, uneven ribbon output is caused more by pressure inconsistency than by the oval orifice itself.