Heathrow Scientific HS1423CC Standard Weighing Boat, Polystyrene, Antistatic, Large, 140 mm L x 140 mm W x 22 mm D, Black (Pack of 500) Flexible polystyrene boats feature smooth surfaces to provide accurate pour-outs with minimal sample loss Biologically inert and resistant to dilute and weak acids, aqueous solutions, alcohols, and bases food-grade compliant Boats are shallow with a wide, flat bottom to resist tipping and rounded corners simplify transfer Measures 140mm length by 140mm width by 22mm depth