This vibrating sleeve is the ideal accessory for your penis pump! The highly imaginative and ergonomic design with removable vibration bullet provides additional strong stimulation during pumping. 1 vibrating mode, Ø approx. 3.0 cm. Material: Phthalate-free silicone and ABS plastic, soft, odorless and non-porous. Easy to clean and hygienic. 4 batteries included. You can use the sleeve with different MALESATION penis pumps or pumps of other brands.