VALVE SEAT RESTORATION KIT. Contents :- (26x Cutters Heads). 1 3/16″, 1 1/4″, 1 5/16″, 1 3/8″, 1 7/16″, 1 1/2″, 1 9/16″, 1 5/8″. 1 11/16″, 1 3/4″, 1 13/16″, 1 7/8″, 2″, 2 1/8″ – 45 Degree. 1 5/16″, 1 7/16″, 1 3/4″, 1 7/8″, 2″, 21/8/” – 30 Degree. 1 1/4″, 1 3/8″, 1 1/2″, 1 5/8″, 1 3/4″, 2″ 70 Degree. (4x) Stems metric size 7 mm, 8 mm, 9 mm, 10 mm. (4x)Stems inch size 11/32″, 3/8″, 5/16″, 7/16″.