These 14mm thick wrapped lid seals are made into a loop with heatproof tape ( leave ON or it will no longer be continuous!) Once fitted the seal will take a few weeks to compress but MUST be glued in place with Everflex silicone sealant which we also sell. These seals will ONLY fit the single lid - that covered ALL the hob - on 1960 Rayburn Royals - all fuels. These seals could be cut down to fit the No 3 & Regent but they will not fit without modification. Please note the jointing tape is permanent so don't remove!