CATERPILLAR 6c3749 Booms, Description: All Of The Pin Holes On This Boom Appear To Be In Good Condition And No Cracks Have Been Found. Weight: Dimensions For Shipping: 6 Feet High, 3 Feet Wide, 20 Feet Long, To Fit Make: CATERPILLAR, Make: CATERPILLAR, To Fit Model: 231D, Model: 6c3749