Ultra-Quiet 2" Nylon Garage Door Roller with Precision 13-Ball Bearing on 4" Stem (10 Pack) Package quantity:1 The cover is made to

The cover is made to rest on the water in order to reduce stress on the pool wall

Simple stylish design comes in multiple color options

Compatible with both UNSC and Covenant HALO blasters

Optra Color 40

Ultra-Quiet 2" Nylon Garage Door Roller with Precision 13-Ball Bearing on 4" Stem (10 Pack) Package quantity:1 The cover is made toQUIET: Nylon Wheel reduces garage door noise by at least 75% compared to standard steel rollers DURABLE: rated for 55,000 door cycles for a 110 lb. door EXTRA LUBRICATION: lubrication groove on roller to disperse lubrication over extended period Standard Replacement Size: 1 13 16" diameter, 4 5 8" long shaft