Contains: valves and operators 1/4" and 3/16" long. Data flags, ejectors, injectors, jet mixers, venturi, nozzles, vessel heads, pumps and lettering guides. The lower edge slides easily along a straightedge and 2-part symbols are drawn by sliding the template. Instruction sheet shows complete valve symbols plus 14 pumps and drives. Size: 5-5/8"X9-3/4"X.020".