Quiet pump alternately inflates and deflates 130 individual bubble air cells * 4 LPM (liters per minute) pump produces consistent air flow and pressure over a 5 minute cycle time * Durable heavy gauge premium vinyl bubble pad provides superior therapeutic treatment and is available with or without end flaps * Pump has built-in brackets for mounting easily to bed * Pad measures 78 (L)x36 (W)x2.5 (H) * Weight Capacity: 300lbs *