Powered by 35 cc engines, both Power Vibe and Power Vibe Pro vibrators can consolidate concrete in applications including slabs, stem walls, and foundations. Low friction heads allow for extended run-time outside of concrete without burning up. Power Vibe offers 2 to 10 ft. flexible shaft lengths and head sizes from 1 to 2 in. diameter. Power Vibe Pro has a flexible shaft length of 2 ft. with a rigid shaft extension, and 2-in. head size diameter. Allen Engineering. 800-643-0095. www.alleneng.com