TIG Welding Torch Insulator Cup Gasket Assorted Size 18-7 18CG 54N01 54N63 Fit PTA DB WP 17 18 26 TIG Welding Torch Accessories 8pcs Fit QQ300 DB PTA SR WP CK 17 18 26 TIG Welding Torch 2 Piece Ref.No : 18-7 Insert back Insulator 2 Piece Ref.No : 18CG Cup Gasket 2 Piece Ref.No : 54N01 Gas Len Insulator 2 Piece Ref No : 54N63 Lg.Dia. Gas Len Insulator