Duk Guard, Wall and Stair Corner Guard - Cleanspec Cumbria
6cm Triangle Three Side Plastic Corner Guard Plastic Edge Protector Corner Protectors - Battery Accessories & Charger Accessories - AliExpress
White Plastic PVC Corner 90 Degree 2.5 Meters Angle Trim Wall Edge Protector Various Sizes by TMW Profiles (25mm x 25mm x 2.5M) : Amazon.co.uk: DIY & Tools