Compatible with replacement part 28111CA, 28111EH, 28121EH, 28125EH, 28131CA, 28131EH, 28141EH, 28157EH, 28165EH, 28167EH, 28175EH, 28181K, 28183MW, 28191CA, 28191EH, 28193EH, 28201EH, 28211CA, 28211EH, 28233CA, 28233EH, 28235EH, 28251EH, 28301TT, 28303RP, 28303SR, 28309EH, and 28317CA. Fits for Sand 1500 and Spa / Pool Filter Pumps Package includes:4 pack 10460 air release valves with o-ring 25003 Replacement:Air release valve with valve o-ring replacement parts. Applicable to various pumps, filtration systems and other equipment, to remove air and sediment from the system before operation. Color: Gray Material: ABS Package Contents: 4 x Air Release Valves with O Rings Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.