What's the difference between an AC Vent Cover and a Linear Slot

These linear slot diffusers feature fully adjustable, aerodynamic pattern controllers fabricated from extruded aluminum, and are available in a large selection

Slot Diffuser - Diffuser Only - 1 Slot

linear slot diffuser catalogue Grilles Back View All Grilles · Multi Directional Outlets · Eggcrate Linear Slot Diffuser 460mm x 155mm 3 Slots · Airform Linear 3 Slot 400mm

linear single slot diffuser 5- LINEAR SLOT DIFFUSER LINEAR CEILING DIFFUSER 6- 7- LINEAR BAR GRILL 8- REGISTER 9- FLOOR & PERFPRATED FLOOR GRILL 10- TRANSFER GRILL 11- ACCESS