Tender For supply of wheeled fire extinguishers (v3) isi marked to is 16018 , portable fire extinguishers (v3) isi marked to is 15683 , 2 kg clean agent , ex-proof mega phone / pa system / loudhailer , emergency escape set (15 min duration) , selfcontained compressed air breathing apparatus (scba) , self-contained compressed air breathing apparatus (scba) cylinder