Genuine Al-ko spring cylinder pack for 150v and some 200v couplings. The spring pack is located underneath the coupling and is used to assist with the handbrake operation. The energy store uses stored spring energy to override the auto reverse brake should the trailer or caravan roll backwards. Overall length 245mm Width of spring 36mm AL-KO part number 648749 Price:NZ$ 147.00 including GST Product Code:AK-648749 Quantity In Stock: 3 Purchase Qty:     ♡ Add To Wish List ♥ Remove From Wish List We only have 3 items left. Don't miss out! View your shopping basket or Browse other items in Other Chassis. Other products you might be interested in AL-KO Triangular Cover for Drawbar, Silver, Plastic NZ$ 96.00 AL-KO M12 Spherical Wheel Bolt 2081670020 NZ$ 12.00 AL-KO Wheel Bolt, conical, For European Caravans with alloy wheels NZ$ 14.00 Breakaway Cable with Fork Head for KNOTT brake system NZ$ 20.00 Bellows Hahn 155 NZ$ 54.00 AL-KO Bellows for 30S ,60S, 90S 120S/SR 250S & 101VB, 2073890210 NZ$ 22.00 AL-KO AKS 2004 / 3004 Bellows for AKS Safety 607133 NZ$ 32.00 HAHN bellow rubber for tow bar coupling, new model NZ$ 35.00 14" Caravan Wheel Cover Monaco set NZ$ 36.00 Breakaway cable for German and UK caravans NZ$ 20.00