Listing is for 1 (one) Service Caster Brand 1/4 inch weld plate for Series 30 Casters with 4 inch x 4-1/2 inch top plates. Weld plate features a 2-5/8” x 3-5/8” to 3” x 3” bolt hole spacing and mounting holes recommended for 3/8” hardware. Fits most casters with 4 inch x 4-1/2 inch top plates. Product has no finish applied. When searching for an easy way to weld your casters to your application or add height to your casters and/or application, consider Service Caster's weld plates for Series 30 casters with 4 inch x 4-1/2 inch top plates. This 1/4" thick, unfinished plate works with most standard casters that feature a 4” x 4-1/2” overall top plate. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward.