Specification Brand : Service Caster BulletPoint1 : These Service Caster Series #20 Polyurethane 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. Wheels are offered in five different colors – Gray, Blue, Black, Maroon, and Red. BulletPoint2 : Weight Capacity: 3" and 3.5": 300 lbs Capacity/Caster; 4", 5", and 6": 350 lbs Capacity/Caster BulletPoint3 : All casters feature a 12mm diameter (1.75 TPI x 1-1/2”) threaded stem. Threaded stems can be difficult to measure. Service Caster recommends having existing threads checked on a thread gauge to determine correct thread size before ordering. 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. BulletPoint6 : Black without a brake Color : 4 Swivel w/2 Total Lock Brakes ExternallyAssignedProductIdentifier1 : 670533894973 ExternallyAssignedProductIdentifier2 : 0670533894973 IncludedComponents : Wheel-Nut ItemName : Polyurethane Swivel Threaded Stem Caster Set of 4 w/3" x 1.25" Gray Wheels and 12mm Stems - Includes 2 with Total Locking Brake - 1200 lbs Total Capacity - Service Caster Brand ItemPackageDimensions_Height : 1.96 inches ItemPackageDimensions_Length : 8.85 inches ItemPackageDimensions_Width : 2.83 inches ItemPackageQuantity : 4 ItemTypeKeyword : stem-casters LoadCapacity : 250.0 pounds Manufacturer : Service Caster Material : Polyurethane Tread on Polyolefin Core Material1 : Acrylonitrile Butadiene Styrene (ABS) Material2 : Rubber Material3 : Steel ModelNumber : Series #20 MountingType : Stem Mount NumberOfItems : 4 PartNumber : SCC-TSTTL20S314-PPUB-M1215-2-S-2 ProductDescription : Listing is for a set of four (4) Service Caster Series #20 casters, two (2) swivel 12mm metric threaded stem with total lock brake casters and two (2) swivel casters, with 3” diameter by 1-1/4” wide gray polyurethane wheels. Supports a total weight of 1,000lbs (250lbs/per caster).When searching for a reliable and durable solution to your caster needs, consider Service Caster’s Series 20 threaded stem polyurethane casters. The Service Caster Series #20 is ideal for light and medium duty material handling, carts, equipment, and shop projects. The bolt hole can accept a bolt or a customized stem, allowing for any type of mounting requirement. The zinc plated finish provides durability under any condition, while the non-marking, non-marring polyurethane wheels perform especially well on hard surfaces such as concrete, tile, and wood. All rolling on a finely crafted ball bearing design that will keep you moving forward. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward. ProductSiteLaunchDate : 2019-04-16T16:24:55.107Z Size : 3" Wheel Style : M8x15mm SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Multi-Surface UnitCount : 4 UnspscCode : 31162702 WebsiteShippingWeight : 8 pounds