Plasplugs SRP 502 Solid Wall Super Grips Fixings Red (100)
They are available in 3 different sizes/colours. The red wall plugs are regular-duty and will accept screws No 6-12 (3.5-5.5mm). Yellow: Regular-duty, accepts screws No.4-8 (3-4.5mm). Brown: Heavy-duty, accepts screws No.8-14 (4.5-7mm).