This document lists various stainless steel roll springs and earthing components that provide reliable solderless earthing for low and medium voltage systems. It provides specifications for 8 roll spring part numbers including their inner diameter, width, length, and application range. It also lists 6 earthing components such as flat and tubular copper earth straps and socks along with their descriptions, maximum lengths, and cross-sectional areas. Contact information is provided at the end for Thorne & Derrick UK.