Firefly Bubble Rings are glow-in-the-dark cock rings made from exceptionally soft liquid silicone for a comfortable fit. Bubble rings ensure prolonged performance and heighten climax. Available in assorted sizes. Suitable with all lubricants. - Product Weight: 110 grams - Product Dimensions: S: 4 cm x 4 cm x 1.1 cm M: 5 cm x 5 cm x 1.3 cm L: 6 cm x 6 cm x 1.6 cm - Product Material: Silicone