All models have a self contained reservoir and are equipped with a single plunger.All models are designed with a compact frame which reduces weight for greater portability, also come with a classic wooden storage case for easy transport.Two types of wedges are available: standard model (ZWF-30) or floor models (ZWF-31 ~ ZWF-32).Units are equipped with a built in 4-way, 3 position manual valve for easy advance and retraction.ZWF-31G model is equipped with a pressure gauge for pressure readings when force is applied.Country of Origin: Taiwan
