These service kits include the diaphragm and valves required to service the Whale Gusher 10 Mk3 pump. Neoprene service kits are suited to exposed installations but are less tolerant to oils and chemicals. Nitrile service kits are oil and chemical tolerant but have a reduced service life in high UV exposure. The Nitrile kit is Whale assembly (AK3714). The Neoprene kit is Whale assembly (AK3706).