All Play and No Work...Finally, a workout you'll look forward to thanks to our Bfit Basic love balls. Used to strengthen kegel muscles for increased arousal, this smart and sassy device is designed to grow with you. Two 24g weighted silicone love balls with single and double harnesses offer the option to work out with one or two weights at a time while freeform weights encased within each ball deliver subtly sexy sensations. The body-safe non-porous silicone is sweetly sensual on contact and provides simple cleanup to keep this workout all play and no work. Materials: Silicone Body-Safe: Yes Waterproof: Yes Care: Soap and Water Lube Pairing: Water Based Diameter: 1.4" (3.5 cm) Total Length: Single Harness: 3.8" (9.6 cm)Double Harness: 5.5" (14 cm) Battery Type: Batteries not required Box Contents: 2 Silicone Harnesses|4 Weighted Silicone Kegel Balls