Consists of four basic components: sample well plate, filter support plate, vacuum plenum, and metal clamping plate. The sample well plate is available in three configurations for producing spots, dots or slots. Compatible with multichannel pipettes. All three plates are interchangeable and can be purchased as accessory plates or in conjunction with a complete system. The tension on the clamping is adjustable, permitting use of a variety of blotting and filtration media.