Hydrofarm  AAPADIV6 Active Aqua 6-Outlet Copper Air Divider
This multi-outlet divider can be individually opened or shut, for total aeration control. Recommended tubing sizes input 1/4-inch internal diameter and output 0.17-inch internal diameter. This product weighs 0.3-pound. Measures 4-4/5-inch length by 2-inch width by 3/5-inch height.