This red plastic blind plug from the Wiska BS range has a diameter of 48mm and a length of 35mm.
04-0260
UniStrand 16mm Strain Relief Bush
from only£0.144
23-0355
Cliff Boot to Suit 23-0360 + 23-0380
from only£0.747
03-0342
UniStrand 3.2mm Heat Shrink 2:1 Black 25m Reel
from only£10.60
04-0630
UniStrand 80mm White Cable Ties - pack of 100
from only£0.650
03-2341
UniStrand 2.4mm x 1.2m Heat Shrink Sleeve Black