About this item EXCLUSIVE FIT: Precision-engineered exclusively for Powerbeats Pro 2 earbuds. Not compatible with previous generations guaranteed perfect nozzle lock & seal. 5X LONGEVITY: Industry-first 5 PAIRS (XS/S/M/L/XL) replace lost/worn tips or customize fit for workout/music/calls. Double the standard kit! BASS-BOOSTED SEAL: 25% thicker silicone walls compared to standard tips blocks noise while enhancing low-end sound. ZERO-SLIP GRIP: Laser-etched texture and sweatproof coating keep earbuds secure during intense activities. No readjustments needed! HYPOALLERGENIC COMFORT: Medical-grade silicone prevents irritation. Oval-shaped core evenly distributes pressure for all-day comfort. Dimensions: 0.5 x 0.5 x 0.4 inches.