Specification Brand : Service Caster BulletPoint1 : These Service Caster Series #20 Expanding Stem 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. Wheels are offered in three different colors – Gray, Blue, Red, Maroon, and Black. BulletPoint2 : Weight Capacity: 3" and 3.5": 300 lbs Capacity/Caster; 4" and 5": 350 lbs Capacity/Caster BulletPoint3 : All casters feature an expanding stem that is 2-11/16” in length. The expanding stem comes in 10 different diameters: (3/4”, 7/8”, 1”, 1-1/8”, 1-1/4”, 1-3/8”, 1-1/2”, 1-5/8”, 1-3/4”, and 1-7/8”). Before ordering, Service Caster recommends measuring the inside diameter of your tubing- this measurement will determine the corresponding expanding stem diameter needed. Not sure how to measure or don't see the size you need? Call us or send us a message. 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 - 1-1/2" Stem Color1 : Black Color2 : Silver ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier1 : 0734005033519 ExternallyAssignedProductIdentifier2 : 734005033519 ItemName : Polyurethane Swivel Stem Caster with 3 Inch Black Caster Wheel and Top Lock Brake - 1-1/2" Expanding Stem - 316 Stainless Steel Caster - 300 lbs. Capacity Per Caster - Service Caster Brand ItemPackageDimensions_Height : 15.8 centimeters ItemPackageDimensions_Length : 3.9 centimeters ItemPackageDimensions_Width : 13.5 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : stem-casters LoadCapacity : 80.00 kilograms Manufacturer : Service Caster Material : Polyurethane Tread on Polyolefin Core Material1 : Iron Material2 : Polyvinyl Chloride (PVC) Material3 : Rubber ModelNumber : Series #20 MountingType : Plate Mount NumberOfItems : 1 PartNumber : SCC-SS316EX20S314-PPUB-BLK-TLB-112 ProductDescription : Listing is for one (1) Service Caster Series #20 1-1/2" expanding stem 316 stainless steel swivel caster with a 3" diameter by 1-1/4" wide black polyurethane wheel and a top locking brake capable of supporting 250 lbs./caster. When searching for a reliable and durable solution to your caster needs, consider Service Caster’s 316 stainless steel polyurethane wheel casters. SS316 casters are ideal for light and medium duty material handling, carts, equipment, and shop projects. Built with 316 stainless steel, which contains additional molybdenum and nickel content, making it more corrosion resistant than standard 304 stainless steel. The non-marking, non-marring polyurethane wheels perform especially well on hard surfaces such as concrete, tile, and wood. Mounting options include top plate, bolt hole, expanding stem and standard and metric threaded stem sizes. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward. ProductSiteLaunchDate : 2021-09-01T19:38:47.180Z Size : 3" Wheel Style : Threaded Brake SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Multi-Surface WebsiteShippingWeight : 1.55 pounds