Designer, Fishing Hall of Fame Inductee Bill Siemantel, built 4 inch BBZ-1 hard swimbait for SPRO to be an even more compact version of the hugely successful 8-inch model. The counterbalanced pin segments and life-like finishes make the lures look so alive, that the BBZ-1 creates a remarkably realistic swimming action. You can work it with a steady straight retrieve or pause and jerk it for awesome S-turns and other realistic underwater aerobics. It may be small, but the SPRO BBZ-1 4 inch can stand up to the largest gamefish.
| Style | Length | Weight | Sink Rate |
| Floating | 4" | 3/4 oz |
N/A |
| Slow Sink |
4" |
7/8 oz | 1 ft/4 sec |
| Fast Sink |
4" |
1 oz | 1 ft/sec |