FILTER PAPER CIRCLES WHATMAN GRADE NO.4 18.5CM DIA BOX 100 Universal Glass Bottles Dimensions shown are number of

Dimensions shown are number of apertures x dimensions and to hold bags with capacities as indicated

Without  stopper  or stopcock

Bactericide and fungicide

With spout and hexagonal glass foot

TST sterilisation indicator strips Colour changes yellow to purple/blue on completing a successful sterilisation cycle

FILTER PAPER CIRCLES WHATMAN GRADE NO.4 18.5CM DIA BOX 100 Universal Glass Bottles Dimensions shown are number ofQualitative Grade Grade No. Flowrate Retention microns Wet strength Thickness, mm Ash % 4 Excellent retention of coarse and gelatinous precipitates Fast 20 25 Low* 0. 21 0. 06 *Suitable for gravity or low suction filtration. Care must be taken to prevent rupture of the paper.