16 Printed matter, technical bulletins, instructional and teaching material for use in connection with fire-fighting equipment, namely, nozzles, couplings, valves, tips, siamese-hose fittings, shut-offs, educators, play pipes, deck pipes, ladder pipes; and accessories, namely, hose and ladder straps, thread adapters, siphons, hose jackets, clamps, strainers, expanders, hose-mending sleeves, caps and plugs; and portable irrigation equipment, namely, conduits, couplings, sprinklers, valves, elbows, stabilizers, risers, gaskets, and plugs