FC2-PPV-4498681 This time, the pen's rubber grip is securely attached to the nipple, achieving enlarged nipples through rubber rings. The tight fit is evident, with noticeable discoloration of the nipples. This firm attachment enhances nipple hardness, creating a striking texture. Additionally, the tube top is designed with cutouts to highlight only the nipples, increasing visual impact. The nipples, enhanced by the rubber grips, stand out as a key feature.