Grating with 8 mm slots, galvanized, 12/10, A 15., Grating with 8 mm slots, stainless steel, 12/10, A 15., Pressure-locked grating, 33x22 mesh, galvanized, A 15., Pressure-locked grating, 55x11 heelguard mesh, galvanized, A 15., Grating with 8 mm slots, galvanized, 12/10, B 125., Pressure-locked grating, 33x22 mesh, galvanized, B 125., Pressure-locked grating, 33x11 heelguard mesh, galvanized, B 125., No grating required.