The ubiquitous Root Trainer vs loo roll germination saga - Oxonian Gardener
Rootrainers - Harrod Horticultural (UK)
Sweet Pea Grow Tubes | Deep Tap Root Trainers - Elixir Garden Supplies
Haxnicks Deep Rootrainers | 32 Reusable Cells, 12 cm Deep, With Holding Tray and Propagating Lid | L 37 cm, W 22 cm, H 8.5 cm | RT010101 : Amazon.co.uk: Garden & Outdoors
Root trainers 45 cell x 20 | H. Smith Plastics Ltd