The most common sexual dysfunction among men is 'Premature Ejaculation', a troublesome concern that can lead to relationship issues.Regain control over your sexual functions by using these 5 masturbation aids of increasing stimulation intensity.Start training for a more fulfilling sexual life today. Check the training guide from here.The 5 CUPs of different stimulation levels of the Men's Training CUP Endurance Training series can help to train male sexual function. Level 01: Size (D × W × H mm/in): 69 × 69 × 155 / 2.72 x 2.72 x 6.1Insertion Length Approx. (mm/in): 150 / 5.91Insertion Width Approx. (mm/in): 45 / 1.77Weight (g/oz): 114 / 4.02 Level 02: Size (D × W × H mm/in): 69 × 69 × 155 / 2.72 x 2.72 x 6.1Insertion Length Approx. (mm/in): 150 / 5.91Insertion Width Approx. (mm/in): 45 / 1.77Weight (g/oz): 113 / 3.98 Level 03: Size (D × W × H mm/in): 69 × 69 × 155 / 2.72 x 2.72 x 6.1Insertion Length Approx. (mm/in): 150 / 5.91Insertion Width Approx. (mm/in): 45 / 1.77Weight (g/oz): 121 / 4.26 Level 04: Size (D × W × H mm/in): 69 × 69 × 155 / 2.72 x 2.72 x 6.1Insertion Length Approx. (mm/in): 150 / 5.91Insertion Width Approx. (mm/in): 45 / 1.77Weight (g/): 119 / 4.19 Level 05: Size (D × W × H mm/in): 69 × 69 × 155 / 2.72 x 2.72 x 6.1Insertion Length Approx. (mm/in): 150 / 5.91Insertion Width Approx. (mm/in): 45 / 1.77Weight (g/oz): 124 / 4.37 Other Specs: Disposable, Prelubricated Materials: Insert Sleeve: Thermoplastic Elastomer (TPE)Casing: PELubricant Ring: PULubricant Ring Lubricant: Water, Glycerin, Propylene Glycol, Hydroxyethylcellulose, Sodium Polyacrylate, Phenoxyethanol, Methylparaben, Hydroxypropyl Beta Cyclodextrin, IPBCInternal Lubricant: Water, Glycerin, Sodium Polyacrylate, Phenoxyethanol, Methylparaben, Hydroxypropyl Beta Cyclodextrin, IPBC*Lubricants certified by EU Directive 76/768/EEC toxicological assessment. Check the FAQ here.