Filled PP. Horizontal design allows pipettes to be fully immersed in disinfectant. Plastic construction cuts down on breakage and chipping of glass pipette tips. Cover fits into groove of pan to minimise spillage of hazardous materials. Resistant to aggressive disinfectants. Can also be used to sterilise small labware instruments and utensils. Stackable, lightweight, quiet and less expensive than stainless steel. Meets OSHA Standard 29 CFR Part 1910.1030 for use as protection against bloodborne pathogens. Autoclavable / Biohazard.