CNR310 This is the complete factory linkage for a Speed Cobra 310 Double Bass Drum Pedal Model HP310LW. Linkage is adjustable in width to allow you to position the footboards of each pedal to your optimum playing position. This will help make your playing more comfortable, accurate, and relaxed. Dale’s Drum Shop is an authorized dealer. A Drummer will respond to you promptly. Tama CNR310 Linkage for HP310LW.