The MTC Bio M5431 T-Shape Spreader, 34 x 140mm, is supplied in sterile packaging, but is also autoclavable and has smooth, rounded edges to prevent unwanted cutting, scraping or gouging of agar during inoculation. The T-shape design ensures that consistently even pressure can be applied across the entire span of the 34mm spreading surface. Designed for spreading and dispersing liquids across the surface of agar culture plates, the spreaders are made of ABS and commonly used for CFU plate counts on water, milk, urine, etc.