2BK pulleys are compatible with various belts including 2-banded A belts, 2-banded B belts, 2-banded cogged AX belts, 2-banded cogged BX belts, as well as single A, B, 4L, 5L, AX, BX, AA, and BB belts. Commonly referred to as double groove BK pulleys, they are available in diameters ranging from 2.50" to 18.75", with custom sizes available upon request. The double BK series pulleys are designed for medium to heavy-duty agricultural and industrial applications. Manufactured using advanced techniques, our double V-belt pulleys feature premium high-performance and high-strength characteristics, utilizing grade 35 cast iron instead of grade 25. The "BK" sheaves accommodate both A section (4L) and B section (5L) belts.