Stop using the traditional vacuum hose for Dynavac Pro 1600 & 2000 as this hose can damage your equipment completely. The Onfloor Technologies have the best replacement hose for your machine to make it feel just like new again. The vacuum hose is 1.50" x 25' with 1-1.5" hose/2 id cuff & 1-1.5 hose/1.5" id cuff.