This part is the original TR4-4A door draught excluder that clips on the sill seam and has an extra round contour on top.

This type of seal is no longer available. We can however supply 611597X which is the same product but without the extra round contour on top. See below
Note: - There are errors and inconsistencies between the TR4 and TR4A original parts books regarding the part numbers for black and blue furflex. There is an error in the TR4 book where hard top black is shown as 611599 when it should be 611589. The TR4A book has the blue and black numbers transposed for hard top cars.
The correct part numbers are:
611597 red soft top
611598 blue soft top
611599 black soft top

611587 red hard top
611588 blue hard top

611589 black hard top

Whilst these are the correct numbers many owners prefer to use the TR5 solution of a combined furflex and rubber seal. See PLATE AV Item 80 of the TR5 listing for colours and soft top/hard top options 

This part appears on the following Triumph Catalogue Plates

Car Type	Plate	Plate Title	Plate No.	Triumph Part Description	No per Unit
TR4	AM	BODY AND FITTINGS: DOORS, HINGES AND LOCKS, GLASS, REGULATOR AND TRIM.	AM103	DRAUGHT EXCLUDER Snappon Red	2
TR4	AM	BODY AND FITTINGS: DOORS, HINGES AND LOCKS, GLASS, REGULATOR AND TRIM.	AM103	DRAUGHT EXCLUDER Snappon Red	2
TR4A	AU	BODY AND FITTINGS: DOORS, HINGES AND LOCKS, GLASS, REGULATOR AND TRIM.	AU100	Snappon Red For use when soft top is fitted	2
TR4A	AU	BODY AND FITTINGS: DOORS, HINGES AND LOCKS, GLASS, REGULATOR AND TRIM.	AU100	Snappon Red For use when soft top is fitted	2