Specification Brand : Service Caster BulletPoint1 : These Service Caster Series #20 Phenolic casters offer various wheel sizes and mounting heights: 3” Wheel: 4-1/8” mounting height; 3-1/2” wheel: 4-5/8” mounting height; 4” wheel: 5-1/8” mounting height; 5” wheel: 6-1/8” mounting height; 6" wheel: 7-1/8" mounting height. BulletPoint2 : Weight Capacity: 3",3.5", 4", 5", and 6": 300 lbs Capacity/Caster BulletPoint3 : All casters feature a 3/4” x 2” square stem with (3) 17/64” diameter mounting holes. Don't see the size you need? No problem! Call us or message us by clicking the blue Service Caster Corporation hyperlink underneath the buy or add to cart button and then clicking the ask a question button. BulletPoint4 : Brake options include a top lock brake (TLB) or a total lock brake (TTL). The top lock brake (TLB), which is featured on 3", 3-1/2", 4", and 5" wheel sizes, places a positive locking force against the wheel tread locking the wheel only. The total lock brake (TTL), which is featured on all wheel sizes, also places a positive locking force against the wheel tread, but the total lock brake (TTL) simultaneously locks the wheel and the swivel for a complete stationary position. BulletPoint5 : Find other wheel materials, sizes and all Service Caster products at our Amazon Storefront. Click on the “by Service Caster” link above the main title on any Service Caster page listing. Color : Swivel - Top Lock Brake - Black CompatibleWithVehicleType : Passenger Car ExteriorFinish : Metallic ExternallyAssignedProductIdentifier : 9155926494837 ExternallyAssignedProductIdentifier1 : 011586606449 ExternallyAssignedProductIdentifier2 : 0011586606449 ItemName : Swivel Square Stem Caster w/4” x 1.25” Black Phenolic Wheel – 3/4” x 2” Square Stem with (3) 17/64” Diameter Mounting Holes & Top Lock Brakes – 300 lbs. Capacity/Caster – Service Caster Brand ItemPackageDimensions_Height : 2.76 inches ItemPackageDimensions_Length : 7.28 inches ItemPackageDimensions_Width : 5.31 inches ItemPackageQuantity : 1 ItemTypeKeyword : stem-casters LoadCapacity : 300.0 pounds Manufacturer : Service Caster Material : Phenolic Material1 : Steel Material2 : Nylon ModelNumber : Series #20 MountingType : Stem Mount NumberOfItems : 1 PartNumber : SCC-SQ20S414-PHS-TLB-34 ProductDescription : Listing is for one (1) Service Caster Series #20 swivel caster with a 4” diameter by 1-1/4” wide black phenolic wheel and a 3/4" square stem with top lock brake capable of supporting 300lbs./caster. When searching for a reliable and durable solution to your caster needs, consider Service Caster’s Series 20 square stem phenolic casters. The Service Caster Series 20 is ideal for light and medium duty material handling, carts, equipment, and shop projects. The zinc plated finish provides durability under any condition, and the phenolic resin wheels are highly resistant to impact damage, providing protection for floors in commercial and industrial settings. Not only are they resistant to water, oil, and grease, but because they are non-metallic, these wheels are spark proof, keeping you safely moving forward. The square stems are designed to be bolted or riveted onto the inside of angled iron legs or against any flat surface. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward. ProductSiteLaunchDate : 2021-03-22T18:19:11.847Z Size : 4" Wheel - 3/4" Stem SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Multi-Surface UnitCount : 1 WebsiteShippingWeight : 2.05 pounds