the largest in the upright boom range, the sb126j really is the ultimate in booms. taking you up to a 40m working height, the sb126j ensures you achieve the toughest of jobs. with a 19.2m outreach and a 1.2m, 140jib for m......the largest in the upright boom range, the sb126j really is the ultimate in booms. taking you up to a 40m working height, the sb126j ensures you achieve the toughest of jobs. with a 19.2m outreach and a 1.2m, 140jib for maximum versatility. the diesel powered, 4 wheel drive and steer machine also has a fixed front, extendable rear axle.