WHALE 1 x Baby Foot Pump Mk2 Service Kit. A complete service kit to replace most of the serviceable parts of a Whale Babyfoot pumps, Whale GP4618 and GP51 foot pump models. Whale Babyfoot Pump Kit Includes: 1 x Neoprene Diaphragm. 1 x Spring. 4 x O Rings. 2 x Fixing Screws.