March 6, 2024 Gradus - Combination Rails CHR 160 Modular system comprising PVC-u covers, aluminium retainers and a full range of finishing accessories. Replaceable, through coloured, easy-to-clean covers – textured to conceal the effects of impact and abrasion. CHR 160 Brochure BoQ Specification PSA 80 Comprehensive Specification PSA 80 Installation Information