Pack of 10 x 4 inch Quality Blue Stripe Radiator Roller Sleeves.
Mini Roller Frame 4" Long Handle | Toolstation
ROLLINGDOG 4 Inch Long Radiator Paint Roller with Adjustable Long Frame, Mini Velour Roller for Painting Behind Radiator, Wall and Ceiling : Amazon.co.uk: DIY & Tools
Flexible Mini Paint Roller Frame plus FREE 5mm MicroSilk
Kennedy LONG ARM RADIATOR ROLLER COMPLETE 5330350K | Cromwell Tools
No Nonsense 4" Long-Handled Mini Roller Set 3 Piece Set - Screwfix