300A 1/2 Features: -Pullys. -For 4L or 0.5'' x 0.85'' belts. -Single V groove. -All pulleys have 0 spokes except 600 A series which has 4 spokes. Generic Dimensions: -Overall 3'' H x 1.25'' W x 3'' D, 0.58 lb. Dimensions: Overall Width - Side to Side: -1.25 Inches. Overall Depth - Front to Back: -3 Inches. Overall Product Weight: -0.58 Pounds.