Smr74zz Stainless Steel Double Shield Bearing 4X7X2.5mm Ningbo Sanzo Import and Export Co., Ltd. Base Info Description Pre：Smr74-2RS Sealed Miniature Stainless Steel Ball Bearing 4X7X2.5 Next：Smr74zzc Ceramic Stainless Steel Shielded Bearing 4X7X2.5 with Si3n4 Ball
