Rubber pistons for manual dispensing with syringes. A wide variety of media can be dispensed without the use of compressed air. The manual dispensing solution can be put together individually. The hand pistons are made of polypropylene resin and compatible with a wide range of meterable media. The rubber plugs are made of thermoplastic material and are available in an ungreased version or, for easier assembly, in a version with lubrication (LUB). All items are available in pack of 50 pcs. Plungers and cartridges must be ordered separately.