Thomas Service Kit. Kit includes Intake filter, 608148 Buna diaphragm, valve plate gasket, valving, top end screws. Kit is compatible with standard Thomas 107 (Buna Diaphragm) and 2107 (Buna Diaphragm) models. Two kits are required for each 2107 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.)