4 per 12', 2 per 14' & 16'

Used in models:12HS, 617, HW320, 2550, 14HSSPL, HW300, 2450, HW340, 2200H, 18HS, 2300H, 16HS, 2355, 994D, 654, BR780, BR7080, BR770A, BR730, 660, 851, 678, 688, BR7070, 640, 648, BR7050, BR750, 650, BR740, 658, 852, 638, BR730A, BR7090, BR750A, 634, BR740A, 630, BR780A, BR7060, 644, 664