Apollo Trainer Kit from California Exotics. "Pump up your training routine!" -American Pumpers Association. Durable cylinder with universal measurements. Silicone sleeve adds superior suction seal and ribbed textures for added sensations. Easy squeeze bulb with quick air release valve. Body safe Silicone enhancer ring included. Silicone (ring, sleeve) SAN (cylinder) Phthalate-Free PVC (hose) ABS (release valve) Rubber (bulb). 8" x 2"/20.25cm x 5cm.