G3000 Technical Parameters Top Cover Plate Diameter 73 mm Bottom Cover Plate Diameter 61 mm Screw Center Distance 0 mm Distance Gas Hole Between Nut together Gas Hole G1/8 Screw (Nut) Tooth 1 pcXM8 x 1.25 1 pcXM16 x 2 Rubber Bellows MAX Diameter 86.36 mm The Stroke 38.1-73.66 mm