Boners Liquid Silicone Ball Stretcher Gray from EDC. Your manly shapes will look even better in this elegant ball stretcher from the Boners collection. The wide ball stretcher is made of soft and flexible silicone, which is of great quality and is very durable. This makes the stretcher stretchy and very comfortable to wear, even during your wildest adventures! Clean the ball stretcher after use with water and toy cleaner or a mild antibacterial soap. Size 1.6 inches.Video.