supply of polyurethane hydrophobic dry form dressing with leak/block detection property pores size 450-500 micron. pore size 40-50 ppi medical grade foam with 500 ml disposable canister and tubing (eash) iso approved size u 2013 26x 15x 1.6 cm approx. (along with canister tubing each). the firm should provide machine for creating vaccum for free use as and when required (vac dressing l with container) 1. vac dressing size 26x 15x 1.6 cm approx. polyurethane ether (highly hydrophobic) foam with d