APC XC1158 Lid Riser Extension .375" Height Increase, 10' LengthAPC XC1158 Lid Riser Extension 0. 375 Inch Height Increase, 10 Foot Length Upgrade your pool cover installation with the APC XC1158 Lid Riser Extension. Designed specifically for use with Automatic Pool Covers brand recessed track lid systems, this extension provides a precise 0. 375 inch (3 8 inch) height increase, ensuring a seamless and professional finish for your pool deck or coping edge. Key Features: Compatible with APC recessed track lid