uxcell Rubber Fisherman Oval Fishing Floater Bobber Stopper Sinker Size S 50 Pcs Black Each Stopper Size : 4.5 x 2.5 mm / 0.18" x 0.1" (L*D) Length : 45 mm / 1.8" Ring Size : 15 x 2 mm / 0.59" x 0.08" (D*T) Lightweight and compact Used to fix the depth of the float