Armitage Shanks Contour 21 Back Support Rail For 70cm Projection Htm64 Wc, 40 X 17 X 35mm Diameter TubeContour 21 back support rails for cushion with clips for 35mm diameter tube Specifications: Material: Aluminium Weight: 0. 85Kg Illustrated Code S6481AC S6481AC: Contour 21 40 x 17cm back rest without cushion S6481MY S6481MY: Contour 21 40 x 17cm back rest without cushion Stainless steel S6481LJ S6481LJ: Contour 21 40 x 17cm back rest without cushion Grey S648136 S648136: Contour 21 40 x 17cm back rest without cushion Blue S6481RN S6481RN: Contour 21