Stirring rods are available in two versions: Pure PTFE solid stirring rod with tapered end, and pure PTFE stirring rod with mild steel core. 

The stirring rod version with steel core can be bent into a permanent shape. Inert and will not scratch, use up to 280ºC. 

Stirring Rods with Rounded Ends - Steel Core
Part Number	303264-0000	303284-0000	303294-0000	303294-0001	303294-0002
Length mm	100	150	200	250	300
Length inches	3.9	5.9	7.9	9.9	11.8
O.D. mm	6	6	6	6	6
O.D. inches	1/4	1/4	1/4	1/4	1/4

Stirring Rods with Flat Ends - Solid PTFE
303334	-0000	-0001	-0002	-0003	-0004
Length mm	100	150	200	250	300
Length inches	3.9	5.9	7.9	9.9	11.8
O.D. mm	8	8	8	8	8
O.D. inches	5/16	5/16	5/16	5/16	5/16