After you get through the tight first inch it opens up to a chamber of stimulation.
Warm it, lube it, and ram your cock into it. The chamber is filled with nubby feelers that will play against your cock differently depending on how you squeeze it and whether you're covering the suction hole. You can even add a bullet vibe to make its tight opening vibrate around your shaft. Your hand never gives you sensations like this.
When you finally blow your load in this soft stretchy masturbation grenade, cleanup is simple. Just flush it out with soap and water, and leave it to dry.
Palm-Tec SE19 Stroker with Stimulation Chamber Specs and Benefits:
Stretchy to fit with the contour of most cocks
Intensely nubbed interior
Can warm quickly to body heat
Includes a convenient clean our reservoir
Compatible with water-based lubricant
Has a bullet compartment (note bullet vibe not included)