Specification Brand : Service Caster BulletPoint1 : The Series 100 pneumatic casters come in 6” (mounting height 7.5”), 8” (mounting height 10”), 8” gray, 10” (mounting height 12.1875”) and 12” (mounting height 13.75”) and are made of pneumatic tread and an inner core filled with pressurized air which remains inflated even with the weight of a vehicle resting on it. BulletPoint2 : Weight capacity ranges from 200 lbs on the 6” caster, 300 lbs on the 8”, 350 lbs on the 10” and 450 lbs. on the 12”. BulletPoint3 : Top plate measures at 4" x 4 1/2" with a bolt hole pattern of 2.625" x 3.625" to 3" x 3" and can either be bolted or welded on. BulletPoint4 : Brake options include top lock brake (TLB), side lock brake (SLB), bolt-on swivel lock (BSL), or combinations of each. The TLB (6, 8, and 10” casters) places a positive locking force against the wheel top, whereas the SLB (12” caster) places the force against the wheel side. The bolt-on swivel lock (BSL) is field installable and converts a swivel caster to rigid for straight-line tracking at any 90 degree angle via a spring-loaded bolt inserted into one of 4 notches found on the swivel raceway. 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 : 4 Swivel - Bolt on Swivel Locks - Black CompatibleWithVehicleType : Passenger Car ExteriorFinish : Zinc ExternallyAssignedProductIdentifier1 : 769433426084 ExternallyAssignedProductIdentifier2 : 5448095811494 ExternallyAssignedProductIdentifier3 : 0769433426084 ExternallyAssignedProductIdentifier4 : 6709309820138 ExternallyAssignedProductIdentifier5 : 00769433426084 IncludedComponents : 4 scaffolding wheels ItemDisplayDimensions_Length : 6.69 inches ItemName : 12 Inch Swivel Pneumatic Casters Set of 4 - Black Rubber Wheels - Includes 4 Swivel with Bolt on Swivel Locks - Heavy Duty Casters - 1,800 lbs. Total Capacity - Service Caster Brand ItemPackageDimensions_Height : 4.318 centimeters ItemPackageDimensions_Length : 16.256 centimeters ItemPackageDimensions_Width : 11.43 centimeters ItemPackageQuantity : 4 ItemTypeKeyword : plate-casters LoadCapacity : 450.0 pounds LoadIndex : 1100 Manufacturer : Service Caster Material : Rubber Material1 : Metal Material2 : Rubber ModelNumber : Series #100 MountingType : Plate Mount NumberOfItems : 4 PackageLevel : unit PartNumber : SCC-100S3506-PNB-BSL-4 PitchCircleDiameter : 8 hundredths_inches ProductDescription : Listing is for a set of four (4) Service Caster Series #100 swivel casters with 12” diameter by 3.5" wide black pneumatic rubber wheels with bolt on swivel locks. Supports a total weight of 1,800 lbs (450lbs/caster). When searching for a reliable and durable solution to your caster needs, look no further than the Service Caster Series #100 casters. The universal design provides an excellent OEM and replacement part for luggage carts, food carts, or any application your business requires. With it’s zinc plated finish and pneumatic rubber wheels all rolling on finely crafted ball bearings, the Service Caster Series #100 provides enhanced noise reduction and consistent roll on any surface, for an overall superior ride under any condition. Note: this caster is NOT intended for highway use! Manual speed only. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward. ProductSiteLaunchDate : 2019-01-24T13:35:40.291Z Size : 12" Black Wheel SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Multi-Surface UnitCount : 4 WebsiteShippingWeight : 48 pounds