Stock Number JT9-441320 Bar Hole Size (In.) 13/16 Base Diameter (In.) 6-7/8 Base Size (In.) 10-5/8 x 7-3/16 Head Diameter (In.) 4-1/8 Height Closed (In.) 15-13/16 Height Extended (In.) 25 Load Capacity (Tons) 20 Model Number SJ-20T Prop 65 Cancer and Reproductive Harm Screw Size (OD x L) 2 x 12 Weight (Lbs.) 34