Shape spiral springs:
cylindrical of various diameters in wire or strip.
Available in wire:
GALVANIZED IRON o UNI EN 10270-1 = SM, DM, DH PHOSPHATED, GALVANIZED, ZINC-ALUMINIUM
UNI EN ISO 6931-1 = 1.4310 (AISI 302), 1.4401 (AISI 316) AND, ON REQUEST, ALL TYPES OF STAINLESS STEEL