Filler B locks are made for use with "C" channel shape flight boards, material is polypropylene and is sized for both nominal 6" and 8" flights. Lightweight yet durable, HMAX filler blocks are usuable with all industry standard channel flights.   Contact Hitachi Maxco for further details. Home © Hitachi Maxco, Ltd. • 1630 Cobb International Blvd. • Kennesaw, GA • 30152 • Ph: 800-241-8209 • Fx: 770-424-9145 www.hitmax.com