Fillable Athletic Standard. A roll away unit that comes with two 42 lbs. heavy duty steel bases with vinyl edge guards and no-mar wheels, two 14 lbs. plated steel uprights with two multi-purpose ring slides for adjustable height and varied uses. Can be filled from the top with sand, concrete, lead or other material for more stationary use. Model #310 is 24 inches across and has a fillable weight of (150-200 lbs). Upgrade to the Jumbo size base (#320) for a more stable setup. Same as above, but is 30 inches across (68 lbs.)with a fillable weight of 250-300 lbs. We recommend using our Recreational Outdoor Net or Economy Indoor Net with these bases.