Check the listing for details. 71794 Spa Cover Lifter Gas Spring for Watkins / Caldera Spas E2000-58, E500-52,. Color: Black, Condition: New. Listed at 70.00 USD. Part Number: 71794. Part Type:Gas Spring. Good for one gas shock. Manufacturer Part Number:71794. The Endless Pool models this part is for are the following: Endless Pools E2000-58 2017-Current, Endless Pools E500-52 2016-Current, Endless Pools E500-58 2016-Current, Endless Pools E700-52 2016-Current, Endless Pools E700-58 2016-Current, Endless Pools X200-50 2016-Current, Endless Pools X500-50 2016-Current.Part Number: 71794. Part Type:Gas Spring. Good for one gas shock. Manufacturer Part Number:71794. The Endless Pool models this part is for are the following: Endless Pools E2000-58 2017-Current, Endless Pools E500-52 2016-Current, Endless Pools E500-58 2016-Current, Endless Pools E700-52 2016-Current, Endless Pools E700-58 2016-Current, Endless Pools X200-50 2016-Current, Endless Pools X500-50 2016-Current.