1.00 mm ZINTEC STEEL - GIVES BETTER PROTECTION AGAINST CORROSION PRICE IS FOR 12 PIECES OF APPROX 99CM LENGTHS SOLD AT THIS LENGTH TO MAKE FITTING EASIER. 2 SECTIONS TRIMMED TO DESIRED LENGTH AND WELDED TOGETHER IN SITU. OUTER SILLS PROVIDED WITH A JOINING PIECE TO EASE WELDING TOGETHER. FITS LWB - CUT TO LENGTH FOR SWB LASER CUT AND CNC FOLDED FOR ACCURACY MADE IN THE UK WELL PACKAGED FOR SAFE DELIVERY CHEAPER ONES ARE MILD STEEL AND ROT THROUGH QUICKLY