This amazing two way level gives you both a horizontal level and bull's eye level with a threaded nylon base that screws into your fitting for ease and accuracy. The Sur-Check Level is made of nylon to prevent damage to fittings. Use it to level all 1-1/2" wall fittings (i.e. SP1022), spa jets, bubblers and umbrella stands or any other application where you need horizontal level and plumb.