Rubber high tension spark plug lead boots.
These fit on the distributor end of the HT lead (not the spark plug end), as well as the coil to distributor lead
Suits all 6 & 7mm leads
Best quality EPDM rubber - manufactured in the UK along with a brass connector
If you are replacing an old/perished/hardened/split spark plug lead boot then this is perfect - troublesome HT leads are often caused by degradation of the boot and brass contact connector rather than needing to replace the whole lead.