Thomas Major Service Kit. Kit includes C85485-P valve assembly service kit, C87048-P Teflon .56" stroke piston & rod assembly kit, C87860-P ring service kit. Kit is compatible with standard Thomas models LGH-305, TA-3051, TA-4101-DC, and GH-3V2B. Kit content services one cylinder. Depending on type of unit being serviced, you may need one or two kits (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.)