BUCHNER FUNNEL, POLYPROPYLENE, 2-PIECE, 110 MM, Each, This polypropylene 2-piece funnels is light-weight, easy to clean and autoclavable. The top portion snaps into the lower one, forming a vacuum seal that does not require greasing. The base of the top portion has a perforated filter plate.¿Looking for more variety, different size or a different product, visit our store!! Texas Residents: Under Texas State Law, this product requires a Precursor Chemical/Laboratory Apparatus NAR-120 permit to ship to a Texas address. After purchase, the seller will contact you via email to verify your permit. Failure to provide a valid permit will result in a cancellation and refund of your order.