Thomas Service Kit. Kit includes Intake filter, 608147 Neoprene diaphragm, diaphragm liner, 1/8-27 NPT intake/exhaust port head & valve plate assembly. Kit is compatible with standard Thomas 107_TFEL (Neoprene Diaphragm) and 2107_TFEL (Neoprene Diaphragm) models. Two kits are required for each 2107_TFEL unit (This item currently has a tariff surcharge which will be added to your order as a separate line item. Tariff surcharges are subject to change.)