L.A Pumps cylinders have a revolutionary comfort welded base, witch promotes a better seal and reduces the discomfort other cylinders may cause. Other manufacturers use a heat processed flared base that has been the industry standard since inception. The base is inconsistent and often causes pinching and restriction at the base of the penis and pubis area. We strongly suggest using the Deluxe Brass Pump; this pump features all bras construction and a pressure gauge, making it more durable and accurate. For optimum comfort, we suggest very low pressure in use. This durable pump provides visual feedback, making it an ideal choice for the novice pumper..